Street Justice / Super Reflexes

Street Justice will probably be out before the end of the year.

I've never played a character with Super Reflexes before, so I thought this would be a good opportunity to try it.

It appears this combination is available on four ATs:

Scrapper, Brute, Stalker, and Tanker

What would be the benefits/perils of selecting any of these?

(I'm hoping for something friendly for soloing, I must admit.)

Peril of taking Super Reflexes on a Stalker?

You could have taken Ninjitsu.

If you want to be dead a lot and have your teams talking about you behind your back, roll a tank. SR are the squishiest of the tanks and need some serious support to stay alive but your team won't care - they will see the Tanker icon and send you out to your death over and over anyway.
If you have a lot of friends with a lot of nice Buffs, go a Brute - with higher res and damage caps, they are the AT of choice in optimal situations.
If you don't expect a lot of support, roll a Scrapper. In a situation where a Brute's higher resistance cap doesn't matter or they have no significant amount of regen, I think a Scrapper is more survivable. They trade a few HPs for quite a bit more damage - the mobs being dead faster offers more mitigation than a few more HPs imo.
If you are willing to part with some real life cash and are hopeful the AT specific IOs will remain as we have seen, roll a Stalker. As long as they get their hands on those IOs in their current state, they are to a Scrapper what a Scrapper is to a Brute. Without those IOs, just don't roll one unless you like the hit and run/die playstyle.

Contrary to what the above poster said I would tank with it. No crystal ball here. It would be easier than tanking with my SR Scrapper or SR Brute, given their capabilities, tanking with an SR tank would just be a non issue.

Edit: I also play an SR stalker, I really like that one, one of my best concepts but thats concept related, again playing a SR stalker isn't a problem and compared to my other stalkers she does alright.

How is Street Justice in regards to aoe and mitigation? I didnt' get much time on SJ during beta, so I dont' know.
If it doesn't have a decent amount of both, it might be a bit tricky to play with SR as a tank. Dont' get me wrong, SR should be an able tank, but well placed aoe mitigation powers just might help it out more than some other sets.
I know my claw/sr scrapper loves a well placed shockwave or focus for their kb.

Tankers should be able to stack some decent -Res on harder targets as well, with Initial Strike (Bruising), Rib Cracker, and an Achilles in Shin Breaker.

SR is good, but only has one trick and the trick is odds to dodge attacks, eventually you get hit alot all at once and at this point you need to restore hit points. That has to come from somewhere other than SR, so that's your dilema. Things that buff your Defense or debuff their to-hit can lower the need to heal-up.

Word of warning about Super Reflexes: There really isn't much of a reason, mechanically, to pick this set anymore. Any defense-based armor set can soft cap everything (or everything but psi in some cases), which is all SR can offer you, and they all bring other tools along with them. The only benefit SR has aside from defense values is a +20% global recharge passive power.

I24 Proc Chance = (Enhanced Recharge + Activation Time) * (Current PPM * 1.25) / 60*(1 + .75*(.15*Radius - 0.011*Radius*(360-Arc)/30))
Single Target Radius = 0. AoE Non-Cone Arc = 360.

/SR also gives easy DDR, too, which some of the defense sets lack. I will admit, if you are planning a high to top end build and going incarnate (spirit for rech), many other sets will give you what /SR has to offer and more. I'll probably go StJ/wp or /shield or quite possibly /regen for a gritty "roll-with-the-punches" "gets-hit-and-comes-back" type toon.

Don't discount the 95% DDR SR gets. It's the difference between needing 47 def to stay at the soft cap on the ITF and well over 50. I don't count shield with hamios as that is a known bug. Any other def set or resistance set with pool/io soft cap will see cascading def failure if enough rebuffs are Applied.

Also, a SR tank can hit the soft cap without any io investment. This can let you build for more options in ioing than brutes or scrappers who need to get to the soft cap first.

I can only imagine how easy it would be to sneeze and soft cap oneself as a /SR Tanker given the ease with which one could do it with a scrapper and tanker defense AT mods ...

A Scrapper using ONE non-common generic IO, a Steadfast resist/+3% def >>>

Hero Plan by Mids' Hero Designer 1.95
http://www.cohplanner.com/

Click this DataLink to open the build!

Leaves lots of room to concentrate set bonuses on +max health ... and the only real fear on most /SR builds (particularly late game IO builds) is the unlucky streak of multiple hits overwhelming ones Health. With a Tankers Health the likelyhood of a lucky steak ending you diminishes with every move towards the Hit Point Cap.

*Most* Critters/targets will have a 50/50 chance of hitting you- that's their base level of accuracy (to-hit buffs modify this number, IIRC, and +accuracy in slotting etc effects the power used). Soft-cap is the max amount, 45% defense to *positions* in melee, ranged, AoE attacks or *types* smash/lethal, fire/cold, energy/neg.energy (toxic & psy are not typed and each use unique scheduels) such that the critters have only a 5% chance to hit you (50% + 45%). You can get more (which is useful for defense debuff powers if you dont have resistance to that, and in incarnate content enemies have higher to hit so one would need 59% to floor typical chances for an enemy to hit you), but the attack mechanics are such that they will always have a 5% chance to hit you - the floor likelihood of landing an attack. Thus it's "capped" as long as they are b/w -3 to +4 or 5 levels (actually above/below this, IIRC, acc is adjusted. Havent looked at this stuff for a while tho, sorry). It is a *soft* cap because there are ways of lessing their acc with debuffs, etc, but this cap represents a functional limit on defense. See ParagonWiki article on defense and attack mechanics for more accurate and exhaustive explanations.

Here's a couple links to the excellent articles in Paragon Wiki Kractis_Sky is referring to.

http://paragonwiki.com/wiki/Attack_Mechanics
http://paragonwiki.com/wiki/Limits

The defense AT Mods I'm referring to are mods applied do to the AT to a base amount .. and is why a blaster does more damage with his Blaze or Flare than a defender will and why in the reverse a defender's Tactics (or other buffs/debuffs) are more potent than that of the blaster. In this case the AT modifier for the Tank AT is larger than that of the scrappers ... meaning the base defense of Focused Fighting for a Tank is 18.5 rather than the 13.88 of the scrapper and then you start applying the effects of whatever enhancements are in the power. The Tank is roughly 5% closer to the cap by virtue of being a Tank. On the other hand the Scrapper melee damage mod (and most attack powers in general) is higher than the Tanks. Also for a Tank the defensive powers are in their primary and therefore generally get them much earlier than they would have access as a scrapper being that they are in their secondary. A Tank could have both Evasion and Lucky by 18th whereas the Scrapper can't have both until 35th when they get Evasion. The net is a much faster and easier journey to reach the soft cap of 45% for a Tank. This is why Laevateinn talks about low to midgame SR/* Tankers being "hugely powerful".

Edit: Also with respect to the ... "that the opponents would miss my toon on every 4th attack, and my toon hit on the 4th attempt. This was against white and yellow level enemies. " ... note the section on Attack Mechanics about the Streak Breaker. Between the Streak Breaker and the nature of human perception to recall bad things vs good things likely explains much of what you're noting (in addition to random is, well, random).