Ahhh...new epic powers! Question from a lost corrupter

So I have a question about the new epic power pools for corrupters, so I thought I'd ask here, since they are defender powers originally. And because it seems the character copier is down, so I can't yet test out the powers....

My toon is a fire/rad corrupter. It was the first toon I took up to 50 and call it my "main". He is currently great at doing the things that both sets are good at, doing loads of damage and debuffing. He can blast, heal, rez, buff, debuff, hold...but what he is really bad at is staying alive. I tend to faceplant pretty easily, and fall easily to status effects (despite the debuffs and taking acrobatics). I am also aiming my bonuses to increase my recharge and end recovery (want more AM!). If looking at my playstyle, I play PvE, sometimes soloing, sometimes grouping, and often duo-ing with a plant/ice dominator.

There's 3 different epic pools I'm looking at, and 3 powers from each:
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Pool: Mu Mastery
Charged armor (+20.6% resist to smashing, lethal, energy)
Electric Shackles (mag 3 hold, 8 sec duration, 32 sec recharge, drains some END)
Summon Adept (Ranged pet that flies and does energy damage. Believe it has a sleep?)
Set Bonus (of note): +6% dam buff, 5% recharge, 7.5% status resist

Pool: Power Mastery
Power Build Up (+8.5% to hit, 68% damage, increases power of secondary effects like heal, holds, etc)
Temp Invulnerability (+22.5% resist to smashing, lethal)
Force of Nature (+37.5 % resist to all but psi, +100% end recovery, has a end crash at the end)
Set Bonus (of note): 15% status resist, +10% recharge +3%recovery, +15% regen +2.5% da, knockback protection.

Pool: Psychic Mastery
Dominate (mag 3 hold, 14.3 sec duration, 16 sec recharge)
Mind Over Body (+20.6% resist to smashing, letal, psionics)
World of Confusion (PBAoE toggle mag 2 confuse)
Set Bonus (of note): Set Bonus from powers (of note): 7.5% status resist, +11.25% recharge +5.5% da
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Each seems to have its strengths, and any is viable.

-It looks like Mu Mastery gives me the best resist toggle (energy seems more common then psi), and the pet is cool, adds to my general damage and survivability (more targets). The hold is kinda weak, but its a hold, and helps stack with doms and trollers.

-Power seems to have the worst resist toggle (only to smash and lethal), and lacks the hold that the others have. I love the idea of Power Boost Up though...since I have holds, debuffs, heals, and lots of attacks...seems like it just makes everything happier. Having force of nature in there makes me feel this is the best defensive option for me (like a mini-version of melee god powers). Finally, Power Boost Up really only needs 3 slots, freeing up room in other spots (thus the wider range of set bonuses).

-Lastly, Psi has the best hold of the 3, a decent resist toggle (better then power, worse then mu it seems). I was REALLY excited about the idea of the confuse power (I love confuse powers), til I realized it was a PBAoE toggle, dont think it will actually confuse much.

Which to choose! Any thoughts or feedback would be loved! And I may X-post this on the defender and corrupter boards...

Lastly, my build without these 3 powers, for reference:

Villain Plan by Mids' Villain Designer 1.803
http://www.cohplanner.com/

Click this DataLink to open the build!

PreEpic: Level 50 Magic Corruptor
Primary Power Set: Fire Blast
Secondary Power Set: Radiation Emission
Power Pool: Leaping
Power Pool: Fitness
Power Pool: Leadership

Villain Profile:
Level 1: Fire Blast -- Decim-Acc/Dmg(A), Decim-Acc/Dmg/Rchg(3), Decim-Acc/EndRdx/Rchg(13), Decim-Dmg/EndRdx(17), Dmg-I(31), Decim-Build%(40)
Level 1: Radiant Aura -- Dct'dW-Heal(A), Dct'dW-Heal/Rchg(5), Dct'dW-Heal/EndRdx/Rchg(11), Dct'dW-Heal/EndRdx(27), Dct'dW-EndRdx/Rchg(31)
Level 2: Fire Ball -- Posi-Acc/Dmg(A), AirB'st-Acc/Dmg(3), Posi-Acc/Dmg/EndRdx(9), Posi-Dmg/EndRdx(15), Posi-Dmg/Rchg(31), Posi-Dam%(34)
Level 4: Accelerate Metabolism -- RechRdx-I(A), Efficacy-Acc/Rchg(5), Efficacy-EndMod/Rchg(9), P'Shift-EndMod/Rchg(15), Efficacy-EndMod/Acc/Rchg(23), Efficacy-EndMod(23)
Level 6: Radiation Infection -- HO:Enzym(A), HO:Enzym(7), HO:Enzym(7)
Level 8: Combat Jumping -- LkGmblr-Rchg+(A)
Level 10: Fire Breath -- AirB'st-Acc/Dmg(A), Det'tn-Acc/Dmg(11), Det'tn-Acc/Dmg/EndRdx(13), Det'tn-Dmg/EndRdx(17), Det'tn-Dmg/Rchg(33), Det'tn-Dmg/EndRdx/Rng(46)
Level 12: Swift -- Run-I(A)
Level 14: Super Jump -- Jump-I(A)
Level 16: Health -- Mrcl-Rcvry+(A), Numna-Regen/Rcvry+(34)
Level 18: Blaze -- Thundr-Acc/Dmg(A), Thundr-Acc/Dmg/EndRdx(19), Thundr-Acc/Dmg/Rchg(19), Thundr-Dmg/EndRdx/Rchg(27), Thundr-Dmg/EndRdx(29), Thundr-Dmg/Rchg(34)
Level 20: Stamina -- EndMod-I(A), EndMod-I(21), EndMod-I(21)
Level 22: Enervating Field -- EndRdx-I(A), EndRdx-I(37), EndRdx-I(43)
Level 24: Rain of Fire -- Det'tn-Acc/Dmg(A), Det'tn-Acc/Dmg/EndRdx(25), Det'tn-Dmg/Rchg(25), AirB'st-Dmg/Rchg(29), Det'tn-Dmg/EndRdx(33), Det'tn-Dmg/EndRdx/Rng(37)
Level 26: Lingering Radiation -- TmpRdns-Acc/Slow(A)
Level 28: Mutation -- RechRdx-I(A)
Level 30: Acrobatics -- EndRdx-I(A), EndRdx-I(33)
Level 32: Assault -- EndRdx-I(A), EndRdx-I(36)
Level 35: Tactics -- GSFC-ToHit/EndRdx(A), GSFC-Build%(36), GSFC-ToHit(36), GSFC-Rchg/EndRdx(37)
Level 38: EM Pulse -- EoCur-Acc/Hold(A), EoCur-Acc/Hold/Rchg(39), EoCur-Acc/Rchg(39), RechRdx-I(39), Hold-I(40), EoCur-EndRdx/Hold(40)
Level 41: [Empty]
Level 44: [Empty]
Level 47: [Empty]
Level 49: Aim -- RechRdx-I(A), RechRdx-I(50)
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Level 1: Brawl -- Acc-I(A)
Level 1: Sprint -- Clrty-Stlth(A)
Level 2: Rest -- RechRdx-I(A)
Level 1: Scourge
Level 0: Ninja Run

I myself use Power Mastery with kin/sonic, and Psi Mastery with rad/rad. Power is great fun with Force of Nature, as kinetics can overcome the crash. With radiation, having all your toggles drop could be disastrous so I'd recommend against that. I have World of Confusion with my rad/rad Defender and have filled it with procs. The confuse is rare/low, but with the procs and Choking Cloud's procs going off it's pretty vicious, and lots of fun! Dominate is also a great hold, but don't dismiss the mass sleep...it allows you to lay your debuffs without much of an alpha. Based on your 3 options, I would gun for Psi Mastery.

Thanks for the responses!

I do fear the end crash...though at least with force of nature I have some warning when it happens. I skipped Inferno after much debate for the same reason...I noticed whenever I used it, all my protections dropped, the enemies became alot stronger, and the surviving few killed me and my team.

I love telekinesis, swmply because its such an odd power...there's no other like it in the game, closest being the /kin repel. Just so fun and odd....but with two leadership powers, 2 end heavy debuffs, a shield and acrobatics, I'm already dying for -end.

I didn't think about the procs...man, they still both sound so good!

I think what I may have to do, though I am wary of what that will entail....I just have to make 2 builds. Power seems to fit better in my current build, but I can make another build in which I take chocking cloud and psi...giving me two more holds and a confuse. A control freak corrupter...=D

I like Psi a lot on my rad/rad defender, because with the Sleep, you can get all your major debuffs (RI, EF, LR) running before they so much as get to alpha strike you. It doesn't aggro, so you even have the option of starting the fight with all the spawn asleep but the boss, and he doesn't know you are there till Rad Infection is running. If you run in with choking cloud, the rest wake up held, and all you have to do is AoE them to death. I soloed Shadow Shard hazard spawns with my rad/rad defender that way, it was slowish but doable. Dominate is also not bad, with decent slotting you permahold the boss you are using as anchor, and it does fair (at least to a defender) damage on top of it.

And between Rikti and Rularuu, the end game heroside at least has a decent amount of psi damage, so the psi shield is also not bad.

Couple of things to keep in mind: 1. with Rad secondary, you don't need assault and tactics especially for pve. RI and EF has that covered. Those powers slots are best used by taking Fighting (tough, and possibly weave). 2. I have been waiting to take corruptor patron powers for my defender especially Leviathan for hibernate for that moment when you need a way out...something to consider. I have had Power Mastery and Psi Mastery. As good as they are, they don't compare to Leviathan as it frees up slots.