My comments may not be all that relevant to you as my main is a MA/Regen and not built for PVP, but to comment on the two that I have any experience with:
I have taken stamina. Actually, my stalker works quite well as a "squishy" scrapper. She has solo'ed with relative ease most of the way to 39 and can comfortably deal with most types of foes even up to 3-5 white or yellow ones at the same time as long as you keep an eye on your health-bar and keep in mind that once it starts to drop for real, you have much less time to react (run, pop an inspiration, or activate dull pain, hasten or whatever) than a scrapper would have. I haven't tried PVP, so this is just PVE (villainous) based experience. But if you want to have the fall-back scrapper option of your stalker, stamina could be a good thing.
As for slotting of attack powers, I have done the same as you with your brute, i.e. 2 ACC, 3 Damage and 1 Recharge - that works pretty well for the most. The AS does fail sometimes and can make things interesting quite quickly, but mostly it works fine. For PVP you might want to sacrifice the recharge for another accuracy but that's just speculation on my part.
i am working currently on stalker builds both at level 20 now one gimped for pvp the other ultra pvp machine. Word of advice : Dont take stamina. Dont waste on attack powers. If u plan to go full pvp make a thorough search and create an attack cycle that hits fast and hard and stick with it. Then focus on the power pools and your secondary set and slot some end reducers. Currently one of the 2 stalkers i got is going for a really weird build kinda new overall but i easily soloed on max difficulty from level 13-20 since yesterday.Stamina is no problem with some end reducers on secondary set despite the 4 toggles i already run 1 passive and clickable. If u plan to go for PvP dont take stamina unless u plan a really heavy attack build scrapperish like. Then again try play a stalker like a scrapper and is most certain u die in pvp zones.
I disagree with TG in this respect 
My specific PVP Spines/EA stalker has stamina as a vital power. That said I only run hide (compulsory) and entropy sheild from the Energy Aura powerset, I do however run Hide, Stealth, Entropy, Superspeed and Fly constantly with very little stamina degredation if any at all.
So at lvl 30 I have 4 pool powersets, fitness, flight, speed and concealment, impale is my main power with AS and placate running in second place.
Regarding slotting, my attacks are running 2xAcc SOs and 4x Damage, the extra 5% from the 4th slot may not sound much but in PVP it all counts.
My build is not for everyone and is not a scrapper, its a distint flying stalker with a ranged attack and is moderately effective at PVP
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Its your fault
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Its your ISPs fault
hmmm stamina of course is a personall choice and depends what you are building. In the full PvP stalker i am creating i run the toggles with no issues and also manage to fully maintain attack cycles. My travel power however is not fly or SS..i run tp and hover. Still my toggles seem to not be so end heavy as yours since i run more toggles than you currently but with end reducers in.Its all a matter of personal choice. By the way my stalker is spines/SR with a pretty unniques sniperish build
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hmmm stamina of course is a personall choice and depends what you are building. In the full PvP stalker i am creating i run the toggles with no issues and also manage to fully maintain attack cycles. My travel power however is not fly or SS..i run tp and hover. Still my toggles seem to not be so end heavy as yours since i run more toggles than you currently but with end reducers in.Its all a matter of personal choice. By the way my stalker is spines/SR with a pretty unniques sniperish build
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Its fly that does the stamina, crazy end eater and I have it on vitually perma, I will be damned that Im going to slot it though (at least not yet ), the rest wouldnt make a dent in normal use. Hover/TP sounds like a good combo, look forward to teaming
**Acceptable "support" responses**
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Its your ISPs fault
Thanks for the great feedback guys. Plenty there for me to think about.
But what about Invisibility & Hide? Do they stack? Or will Hide only stack with Stealth?
And will the /EA shields stack their supposedly damage-typed defence on top of Hide's positional-typed defence?
not sure but, as far as i know hide+invis stack, BUT u cant have hide+stealth+invis - only one or the other, personally stealth does the trick mostly anywho so i go with that n hide :d
as for stam, regen kinda requires you have it so you can slot your attacks with as much dmg as poss (ninja blade) as having integration, hide, stealth + sj on at once takes some end if attacking : also having instant heal on means end death if a prolonged fight ensues 
anywho..........new cossie on my stalker means eye candy ! XD
You cant attack while invis'd I learned this to my cost and it took another respec to sort my defender out
**Acceptable "support" responses**
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You cant attack while invis'd I learned this to my cost and it took another respec to sort my defender out
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Ahh that answers the question - I figured it would be just like Grant Invisibility (that you could attack to break out of the invis), except in personal toggle form, but obviously it isn't. I'll just take Stealth then - saves me a power slot 
As for Stamina, my Brute needed it eventually because I run so many toggles, but even without it I could still get through several fights before needing to rest (took it mainly so I could do whole missions without pause, to keep Fury high, and so I don't hold fast teams back). On paper the Stalker doesn't seem nearly as bad for End usage, especially if I only run Hide and Entropy Shield for PvE. In PvP sure I'd have more toggles running (Stealth, travel power) but surely just playing hit-and-fade you're not going to be in a situation where you run out of End while fighting, as long as your toggles don't add up to more than your base end recovery (and End Reducer SOs can make certain of that).
So I'm going to try and do without Stamina.
Thanks for answering my questions so promptly guys.
If an /EA stalker sees this post I'd still like to know if the def from Kinetic/Power shields stacks on top of Hide's great AE defence (like I think the minor def boost from Stealth will).
I may post up a potential build later, if I can get it to a point I'm happy with.
I'm building a scrapping PvE stalker with EM/Regen, they will likely nead Stamina, and I want to maximise my hit point recovery with Health anyway. Ultrascorpion will never be as uber as a pure stalker or regen scrapper though, poor chap.
I really should do something about this signature.
i have to agree that PvE scrappers NEED stamina. My non stamina builds are purely PvP..
Im going for stamina on my stalkers and there going to be pvp builds but I need to get them lvs so they can get more slots wich means stamina.
A friend of mine DIDN'T take stamina, and I got to see him play at around lvl 30. It's was terrible. Kill 2 groups of mobs, and you're almost without endurance. In case of bigger groups / tougher enemies, make it 1.
Ok lets put this one to bed as a /EA stalker u do not need stamina,nothing to stop you taking it,but you don't need it.
You have the benefit of Endurance Drain,this with only 2 slots of endurance modification will regain you about 70% of your endurance bar,from 1 enemy.It also recharges relatively quickly,so you can keep attacking if you need to,nicely it is auto-hit so doesn't need accuracy enhancements.
I have played Public Enemy No9 thru to lvl 40 with no real problems, yes you have to remember at low levels that you're not a scrapper but as you progress and achieve a decent attack chain you won't need to scrap because your enemies in PvE will be dead around you.
In PvP hes good not brilliant but he can stand toe-toe with a regen scrapper and if they've not built themselves correctly take them out.That is of course they're not already face-planted from the AS.
Stalkers are all about front end damage and the EM set has massive damage potential,you can achieve 1000+ damage from energy transfer+build-up from Hide
So the basics from the powersets will give you a very nice Char "out-of-the-box" so to speak with enough powers left over for some customisation.I would tell you what PE has but I don't want to spoil the surprise for all those little Heros
1) Stealth / Invisibility -
You cannot attack while you run invisibility, thats pretty much the problem.
2) Power/Kinetic Shields -
Do what everybody else does. Leave the tanks if they are running pbaoes. Try eating purples before you attack, that the best strategy.
3) To Stamina, or not to Stamina and 4)]Slotting
I would prolly leave stamina. I would slot my attacks 2 acc, 3 dam ,1 end, but find room for hasten.
SLOT BUILD UP! with tohit buffs. Thats how you cure your acc problems.
So 2 acc in your attacks and 2-3 tohit buffs in build up. Thats a
pretty good combo.
A Paragon Defender
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(...) and the EM set has massive damage potential,you can achieve 1000+ damage from energy transfer+build-up from Hide (...)
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Energy transfer does the same ammount of damage out of hide; it just doesn't "damage" you then. So it's better to use hide with something that can crit, unless you're low on health.
One of my reasons for creating EM/Regen is I want to see if I can kill myself with Energy Transfer + MoG.
Should be a no-debter in theory.
I really should do something about this signature.
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(...) and the EM set has massive damage potential,you can achieve 1000+ damage from energy transfer+build-up from Hide (...)
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Energy transfer does the same ammount of damage out of hide; it just doesn't "damage" you then. So it's better to use hide with something that can crit, unless you're low on health.
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Hmm but is there actually anything that will do the same amount of damage (barring AS) even with a crit?
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(...) and the EM set has massive damage potential,you can achieve 1000+ damage from energy transfer+build-up from Hide (...)
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Energy transfer does the same ammount of damage out of hide; it just doesn't "damage" you then. So it's better to use hide with something that can crit, unless you're low on health.
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Hmm but is there actually anything that will do the same amount of damage (barring AS) even with a crit?
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1) Stealth / Invisibility -
You cannot attack while you run invisibility, thats pretty much the problem.
2) Power/Kinetic Shields -
Do what everybody else does. Leave the tanks if they are running pbaoes. Try eating purples before you attack, that the best strategy.
3) To Stamina, or not to Stamina and 4)]Slotting
I would prolly leave stamina. I would slot my attacks 2 acc, 3 dam ,1 end, but find room for hasten.
SLOT BUILD UP! with tohit buffs. Thats how you cure your acc problems.
So 2 acc in your attacks and 2-3 tohit buffs in build up. Thats a
pretty good combo.
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Thank you, that's pretty much everything I needed to know
I'm not so worried about the AoE defence stalking anymore - realised the power/kinetic shields are pretty poor anyway, when a single purple Luck insp would be so much better than both shields IF I wanted to attack through a PBAE toggle effect (I was thinking more about defenders/controllers with those effects up, than tankers). I'll probably take un-slotted Kinetic Shield though, because it will help a little in normal gameplay and because if I didn't take a shield I'd have to take Barrage, and that seems pointless as I wouldn't slot it.
I've had Hasten and Build-Up in my planned build since the start, both with 3 Recharge Reducers. I'm guessing the 3xToHit enhs you suggest for build-up is for PvP - I'm going to try and free up slots to do that. I'm also going to slot my attacks 2xAcc, 3xDmg, 1xEndRed now because having 3xAcc does seem like overkill, and the End Reduction will help as I still think I can get away without needing stamina.
Going to tweak the slotting a bit then I'll post my proposed build here for comment.
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I've had Hasten and Build-Up in my planned build since the start, both with 3 Recharge Reducers. I'm guessing the 3xToHit enhs you suggest for build-up is for PvP - I'm going to try and free up slots to do that.
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Trust me, it'll serve you in PvE as well. 
Nothing more humilating, and dangerous, than missing your Assassin Strike against a Boss mob. The "eheheh, hi..." feeling just before you get squished is something you want to avoid.
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Trust me, it'll serve you in PvE as well.
Nothing more humilating, and dangerous, than missing your Assassin Strike against a Boss mob. The "eheheh, hi..." feeling just before you get squished is something you want to avoid.
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Getting squished after your biggest attack goes wrong is something I'm well acquainted with - with my Fire/Fire Brute that usually involves Fire Sword Circle and a big spawn of Mu Stalkers Playing a Stalker should fit perfectly into my ethos of risking my neck in the hunt for "big orange numbers"
Ok here's my proposed build so far. My Stalker is currently L6 - I made him ages ago (used bio & costume from my deleted CoH Inv/EM tanker - figured I might be rare concept-wise, having a stalker that isn't a ninja and is "huge" to boot ) - he has Barrage instead of Kinetic Shield, but I don't want to delete and re-make as he has the Christmas badges so I'll respec to Kinetic Shield later. Otherwise anything past L6 can be changed as need be.
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Exported from Ver: 1.7.5.0 of the CoH_CoV Character Builder
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Name: Stalker - EnergyM + EnergyA (to L40)
Level: 40
Archetype: Stalker
Primary: Energy Melee
Secondary: Energy Aura
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01) --> Energy Punch==> Acc(1)Acc(3)Dmg(3)Dmg(5)Dmg(9)EndRdx(29)
01) --> Hide==> DefBuf(1)
02) --> Bone Smasher==> Acc(2)Acc(5)Dmg(7)Dmg(7)Dmg(9)EndRdx(15)
04) --> Kinetic Shield==> DefBuf(4)
06) --> Assassin's Strike==> Acc(6)Acc(11)Dmg(11)Dmg(13)Dmg(13)EndRdx(15)
08) --> Build Up==> Rechg(8)Rechg(17)Rechg(17)TH_Buf(27)TH_Buf(34)TH_Buf(37)
10) --> Hasten==> Rechg(10)Rechg(21)Rechg(21)
12) --> Placate==> Rechg(12)Rechg(23)Rechg(23)
14) --> Super Speed==> Run(14)
16) --> Entropy Shield==> EndRdx(16)
18) --> Stun==> Acc(18)Acc(19)DisDur(19)Rechg(27)
20) --> Teleport Foe==> Acc(20)Acc(25)
22) --> Air Superiority==> Acc(22)Acc(25)
24) --> Stealth==> DefBuf(24)
26) --> Energy Transfer==> Acc(26)Acc(29)Dmg(31)Dmg(31)Dmg(33)EndRdx(33)
28) --> Energy Drain==> EndMod(28)EndMod(31)Rechg(33)
30) --> Hover==> Fly(30)Fly(34)Fly(39)
32) --> Total Focus==> Acc(32)Acc(34)Dmg(36)Dmg(36)Dmg(36)EndRdx(37)
35) --> Conserve Power==> Rechg(35)Rechg(37)Rechg(39)
38) --> Overload==> DefBuf(38)DefBuf(39)DefBuf(40)Rechg(40)Rechg(40)
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01) --> Power Slide==> Run(1)
01) --> Power Quick==> Run(1)
01) --> Sprint==> Run(1)
01) --> Brawl==> Acc(1)
02) --> Rest==> Rechg(2)
01) --> Assassination==> Empty(1)
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Ignore the level numbers on the slots - in game I always tend to slot things when I feel its necessary, just using my plan to make sure I dont exceed the total number of slots assigned in the final build.
A few notes:
Air Superiority / Stun / Teleport Foe: In PvP Im hoping all three of these powers would be helpful to prevent someone running away straight after the AS (e.g. if they were very alert). Also if I have to scrap to finish off a single opponent, in PvE or PvP (assuming its not too dangerous to stick around), then Id rather they were disoriented or lying on the ground while I finish them. Also I wanted a -fly power so Air Sup gives me that.
I can potentially see some tactical combinations, e.g. using TP Foe on a flyer, knocking them down with Air Sup, Stunning them, Placating them then ASing them and finishing off with ET/TF while they're still affected by the disorient. Or maybe Im just day-dreaming and not being realistic. I just like the tactical possibilities of all 3 of these powers and if it turns out they dont mesh with my needs then the 1st respec wont be far away. At these levels Id also have all three of them, plus Stealth, in time for Sirens Call.
Hover: Filling the only gap I have from L26-40 (all the other powers are taken at the earliest possible level I could get them). I dont like the slow speed of hover (got it 3-slotted on a CoH alt), but it does give me some much needed vertical movement capability and the possibility of ASing hovering enemies in both PvP and PvE.
I toyed with the idea of getting Fly, but the endurance drain would be too heavy with my other toggles on, plus Ive read that the momentum makes it very hard to AS hovering foes. I also thought about getting Teleport just for escape/travel purposes, but without Stamina and heavy slotting I fear that would be painful to use, and I doubt its accurate enough for mid-air interceptions in PvP (never used it - assume it always TPs you the max range if you dont have a patch of ground to aim at?).
Energy Drain / Conserve Power: I have to wait a while to get them, but hoping that these will be able to free me from the burden of taking 2 powers I dont want/need in order to get Stamina. I think they should do in conjunction with the EndRdx in my attacks. I had to do a lot of End-tweaking on my brute re toggles and slotting and hope this wont prove as tricky (less toggles on Stalker but no stamina).
Overload: Panic-button power, both for PvE and PvP. Activation time is faster than Phase Shift (which I was considering, back when I was going to take Invis), lasts longer (though protection isnt as good) and I assume you can still fight while its on. If you can, then I guess it could be one solution to being able to AS through PBAE toggle effects in PvP. I just have no idea if its as good as it appears to be on the planner. Opinions?
I dont think Ive missed anything, except utility/luxuries like Teleport/Fly, Recall Friend (for PvE teaming) or a self-heal (I certainly dont have space for the Medicine pool - green insps will have to do).
Question: just noticed that my planner says you can slot Sprint with Jump enhancements. I assume that only affects distance and not height? If it affects height then I may slot Jump in there as I know having a decent jump can be useful to super-speeders.
My Brute is almost L40 so Im considering which AT to give my full attention to next. I had no trouble coming up with potential builds for my Corruptor, Dominator and Mastermind alts, but while much of my Stalker's build is obvious for the early levels there are some things Im not sure about. And that might deter me from playing the Stalker next, so I need some advice.
). And also using TP Foe and/or Stun to stop anyone running if they survived the AS.
Ive decided to go Energy Melee & Energy Aura, for character concept reasons as much as EMs effectiveness. The Stalker I have in mind is a hit-and-run build for solo PvE/PvP, but would also be teaming. Much of my info comes from SherkSilvers planner - I cant play a character without planning it first. Ive also been looking at what powers the Stalkers Ive teamed with have taken.
1) Stealth / Invisibility - a lot of Stalkers take Stealth, to overlap with Hide in PvP for further protection against +perception buffs and yellow insps, but I havent seen any Stalkers taking Invisibility for even better concealment.
Question: Do Stalkers avoid Invisibility because it would cost another power choice (either Grant Invis or Stealth), or are Hide and Invisibility mutually exclusive so they cant stack?
2) Power/Kinetic Shields - Energy Aura seems light on damage defence (although Overload looks great as a panic button power), but extremely good for status resists, plus it has some nice utility (Conserve Power, Energy Drain). Ill probably take Kinetic Shield or Power Shield at L4, because Barrage looks worthless for a Stalker and Im forced to take one of those three (will have Energy Punch and BoneSmasher at L1 & L2).
Ive also been thinking about PvP against enemies with PBAE toggles running (to disrupt Assassins Strike and/or Hide). Many are elemental based (like Blazing Aura) so might Power Shield be more useful for PvP? Also Im wondering if debuff toggles are resist-typed, even if they dont do damage e.g. does Storms Hurricane count as cold based? Admittedly the shield will give a small bonus (I wont slot it) and theres always purple insps in situations like that, but still
Question: Power Shield or Kinetic Shield, and will they stack with the AE defence from Hide?
3) To Stamina, or not to Stamina - Hit & run = not so dependant on endurance for long fights, and in PvE Id only have a few toggles (Hide, Entropy Shield, Kin/Pow Shield), so will I even need Stamina? Ok Ill be scrapping a little in a team situation, but Stamina needs a lot of power choices in a tight AT build like the Stalker (and while Hurdle might be handy to me, Swift and Health wont add much). Also Energy Aura gets the aforementioned Conserve Power and Energy Drain, albeit not until L28+ ... although my Brute was ok without Stamina until L28 due to FAs Consume power (like Energy Drain but with minor damage) and I wouldnt expect my Stalker to scrap that much. Also perhaps blue insps could cover the gap in the mid 20s.
Question: Stamina necessary for /EA? Does Energy Drain cause much aggro? (I would think not, as it does no damage) Might it be worth slotting Rest for Recharge Reducers to cut downtime instead?
4) Slotting - My Brute had all attacks slotted 2xAcc, 3xDmg, 1xRchg until recently, when I acquired another toggle and had endurance problems so I dropped an Accuracy SO in favour of an Endurance Reducer in each attack (and now I have more End than I know what to do with, hehe), but I really noticed my hit-rate drop in PvE (can live with it, but it was noticeable - I know for serious PvP Id have to drop the End Reducer for an Accuracy) - he doesnt have Hasten.
For the Stalker I would think that missing your target would potentially be more fatal, as you dont have good resists and lots of health to fall back on like a brute does during a protracted fight. Also accuracy debuffs would be a killer (theyre bad enough for my brute). Plus its harder to hit in PvP so more Accuracy would be essential. The Stalker will have Hasten, so Im not planning to take Recharge Reducer SOs on the attacks. I dont plan on being around scrapping long enough to run out of Endurance (except maybe when teaming), so dont need Endurance Reducers. So I was thinking of slotting 3xDmg and 3xAcc in my attacks. Probably overkill by one Acc SO for PvE, but perhaps not for PvP.
Question: Is slotting 3xDmg and 3xAcc in all attacks (incl. Assassins Strike) feasible, or is it overkill?
I have other crazy ideas, such as taking Air Superiority for a knockdown (for when Stun runs out, if Im forced to scrap down a single target), and as pre-cursor to getting Fly - because I can foresee my chosen travel power SuperSpeed being hellish to use in Nervas Primeva, plus Fly could be handy for killing hoverers in PvP (and if momentum is too much for AS to cope with, Id have to settle for an Energy Transfer in passing
But thats probably enough questions to be going on with. Id post my potential build, but until I know the answers to these questions I dont want anyone laughing at it