you might be happier with this build. It's less defense, but you'll be able to solo/kill stuff alot easier.
ooh and which T4 do you have?
Repulsion uses alot of endurance, but seems interesting to put proc's in it. You could try a Force Feedback proc too.
Hero Plan by Mids' Hero Designer 1.942
http://www.cohplanner.com/
Click this DataLink to open the build!
Ms. Nightshade: Level 50 Mutation Defender
Primary Power Set: Force Field
Secondary Power Set: Dark Blast
Power Pool: Flight
Power Pool: Leadership
Power Pool: Concealment
Ancillary Pool: Dark Mastery
Hero Profile:
Level 1: Deflection Shield -- LkGmblr-Rchg+(A), DefBuff-I(3), RedFtn-Def/Rchg(3)
Level 1: Dark Blast -- Dev'n-Acc/Dmg(A), Dev'n-Acc/Dmg/EndRdx/Rchg(7), Dev'n-Acc/Dmg/Rchg(9), Dmg-I(13)
Level 2: Gloom -- Dev'n-Acc/Dmg(A), Dev'n-Acc/Dmg/EndRdx/Rchg(9), Dev'n-Acc/Dmg/Rchg(11), Dmg-I(11)
Level 4: Moonbeam -- Mantic-Acc/Dmg(A), Mantic-Dmg/EndRdx(5), Mantic-Dmg/EndRdx/Rchg(5), Mantic-Dmg/ActRdx/Rchg(7), Mantic-Dam%(13)
Level 6: Insulation Shield -- LkGmblr-Rchg+(A), DefBuff-I(23), RedFtn-Def/Rchg(25)
Level 8: Detention Field -- RechRdx-I(A)
Level 10: Hover -- LkGmblr-Rchg+(A)
Level 12: Dispersion Bubble -- RedFtn-Def/EndRdx(A), RedFtn-EndRdx/Rchg(17), RedFtn-EndRdx(17), RedFtn-Def/EndRdx/Rchg(21), RedFtn-Def(21), RedFtn-Def/Rchg(31)
Level 14: Fly -- Flight-I(A)
Level 16: Tenebrous Tentacles -- TotHntr-Acc/Rchg(A), TotHntr-Acc/EndRdx(27), TotHntr-Immob/Acc(29), TotHntr-Acc/Immob/Rchg(29), Dmg-I(34), Dmg-I(34)
Level 18: Dark Pit -- Stpfy-Stun/Rng(A), Stpfy-EndRdx/Stun(31), Stpfy-Acc/Rchg(33), Stpfy-Acc/Stun/Rchg(33), Stpfy-Acc/EndRdx(34)
Level 20: Night Fall -- Det'tn-Acc/Dmg(A), Det'tn-Dmg/EndRdx(25), Det'tn-Dmg/Rchg(27), Det'tn-Dmg/EndRdx/Rng(37), Det'tn-Acc/Dmg/EndRdx(37)
Level 22: Personal Force Field -- LkGmblr-Rchg+(A), LkGmblr-Def/Rchg(23), LkGmblr-EndRdx/Rchg(33), LkGmblr-Def/EndRdx/Rchg(39)
Level 24: Repulsion Field -- ExStrk-Dam%(A), EndRdx-I(31), EndRdx-I(37)
Level 26: Repulsion Bomb -- Det'tn-Acc/Dmg/EndRdx(A), Det'tn-Dmg/EndRdx/Rng(42), Det'tn-Dmg/Rchg(42), Det'tn-Acc/Dmg(42), Det'tn-Dmg/EndRdx(43)
Level 28: Assault -- EndRdx-I(A)
Level 30: Stealth -- RedFtn-Def/EndRdx(A), RedFtn-Def/Rchg(36), RedFtn-EndRdx/Rchg(36), RedFtn-Def/EndRdx/Rchg(36), RedFtn-Def(39), RedFtn-EndRdx(43)
Level 32: Force Bubble -- EndRdx-I(A)
Level 35: Life Drain -- Nictus-Acc/Heal(A), Nictus-Heal(39), Nictus-Heal/HP/Regen/Rchg(43)
Level 38: Maneuvers -- RedFtn-Def/EndRdx(A), RedFtn-Def/Rchg(40), RedFtn-EndRdx/Rchg(40), RedFtn-Def/EndRdx/Rchg(40), RedFtn-Def(45), RedFtn-EndRdx(45)
Level 41: Dark Consumption -- P'Shift-EndMod/Acc/Rchg(A), P'Shift-Acc/Rchg(45), P'Shift-EndMod/Rchg(46), Efficacy-EndMod/Acc/Rchg(46)
Level 44: Dark Embrace -- S'fstPrt-ResDam/Def+(A), TtmC'tng-ResDam/EndRdx(46), Aegis-ResDam/EndRdx(50)
Level 47: Soul Drain -- GSFC-ToHit(A), GSFC-ToHit/Rchg(48), GSFC-ToHit/Rchg/EndRdx(48), GSFC-Rchg/EndRdx(48), GSFC-ToHit/EndRdx(50), GSFC-Build%(50)
Level 49: Soul Transfer -- Empty(A)
Level 50: Nerve Core Paragon
Level 50: Void Core Judgement
Level 50: Warworks Core Ally
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Level 1: Brawl -- Empty(A)
Level 1: Sprint -- ULeap-Stlth(A)
Level 1: Vigilance
Level 2: Rest -- Empty(A)
Level 4: Ninja Run
Level 2: Swift -- Flight-I(A)
Level 2: Health -- Mrcl-Rcvry+(A), Numna-Regen/Rcvry+(19)
Level 2: Hurdle -- Jump-I(A)
Level 2: Stamina -- P'Shift-End%(A), P'Shift-EndMod/Rchg(15), P'Shift-EndMod(15), EndMod(19)
perma jump is ---> /up 1
T4 Core Nerve. T3 Total Core Warworks. T3 Total Core Judgement. While running it, I'm actually already almost softcapped positionally on the build you suggested. Just not on melee, which shouldn't be a problem seeing as she can fly.
My second character and first defender was my Force/Dark defender. I've played her from level 1 to 50 with just SO enhancements, and gotten to tier 4 Alpha, tier 2 Judgement and Lore. It wasn't easy.
Over my break from the game, I thought I'd give Mid's Hero Designer a shot, and put together a good build for her finally using those inventions I've been avoiding.