MA/Dark build - Need your thoughts

So, my MA/Dark endurance hog is getting ever-closer to 47 and the time to start buying the level 50 IO's (already have the 40's), and is working on unlocking the Villain epic pools... And now I can't decide what to *do* with him. First, I thought I'd try to get as much defense as possible (he's a bit squishy, and I'm sometimes a bit too slow on Dark Regeneration, and end up on Soul Transfer instead... Ooops). Then I realized that that's more or less pointless, I'd be gimping everything else so much, and still be around 10% short of the softcap. So then I ran a build, skipped most of the Defense (still took Tough/Weave), and took a couple different powers... And wasn't terribly happy with that, either... And I'm still in debate on which Incarnate to go for... Musculature, Cardiac, or Spiritual would all have their uses. I'm leaning towards Cardiac for that extra survivability (The very-rare is good for about 5% more Resistance across the board), but then I looked at Musculature... That extra damage looks tasty... So now, I'm stuck in Circular Logic City, unsure of what to do.

So, here's what I'm looking at right now in Mids (Cardiac is active) -

Hero Plan by Mids' Hero Designer 1.92
http://www.cohplanner.com/

Click this DataLink to open the build!

Level 50 Technology Scrapper
Primary Power Set: Martial Arts
Secondary Power Set: Dark Armor
Power Pool: Flight
Power Pool: Fighting
Ancillary Pool: Leviathan Mastery

Hero Profile:
Level 1: Thunder Kick -- Mako-Acc/Dmg(A), Mako-Dmg/EndRdx(3), Mako-Dmg/Rchg(15), Mako-Acc/EndRdx/Rchg(34), Mako-Acc/Dmg/EndRdx/Rchg(42)
Level 1: Dark Embrace -- ImpArm-ResDam(A), ImpArm-ResDam/EndRdx(5), ImpArm-ResDam/Rchg(31), ImpArm-ResDam/EndRdx/Rchg(37)
Level 2: Storm Kick -- Mako-Acc/Dmg(A), Mako-Dmg/EndRdx(3), Mako-Dmg/Rchg(23), Mako-Acc/EndRdx/Rchg(34), Mako-Acc/Dmg/EndRdx/Rchg(42)
Level 4: Murky Cloud -- ImpArm-ResDam(A), ImpArm-ResDam/EndRdx(5), ImpArm-ResDam/Rchg(31), ImpArm-ResDam/EndRdx/Rchg(39)
Level 6: Cobra Strike -- Mako-Acc/Dmg(A), Mako-Dmg/EndRdx(7), Mako-Dmg/Rchg(25), Mako-Acc/EndRdx/Rchg(34), Mako-Acc/Dmg/EndRdx/Rchg(43)
Level 8: Crane Kick -- Mako-Acc/Dmg(A), Mako-Dmg/EndRdx(9), Mako-Dmg/Rchg(27), Mako-Acc/EndRdx/Rchg(36), Mako-Acc/Dmg/EndRdx/Rchg(43)
Level 10: Obsidian Shield -- S'fstPrt-ResDam/Def+(A), S'fstPrt-ResDam/EndRdx(11)
Level 12: Hover -- GftotA-Def(A), GftotA-Def/EndRdx(13), GftotA-Def/Rchg(13)
Level 14: Fly -- Zephyr-ResKB(A), Winter-ResSlow(15)
Level 16: Dark Regeneration -- Mrcl-EndRdx/Rchg(A), Mrcl-Heal/Rchg(17), Mrcl-Heal/EndRdx/Rchg(17), Theft-+End%(19), Theft-Acc/EndRdx/Heal(40), Theft-Acc/EndRdx/Rchg(40)
Level 18: Crippling Axe Kick -- Mako-Acc/Dmg(A), Mako-Dmg/EndRdx(19), Mako-Dmg/Rchg(29), Mako-Acc/EndRdx/Rchg(36), Mako-Acc/Dmg/EndRdx/Rchg(43)
Level 20: Cloak of Darkness -- GftotA-Def(A), GftotA-Def/EndRdx(21), GftotA-Def/Rchg(21)
Level 22: Death Shroud -- Erad-Dmg(A), Erad-Dmg/Rchg(23), Erad-Acc/Dmg/Rchg(31), Erad-Acc/Dmg/EndRdx/Rchg(40)
Level 24: Focus Chi -- RechRdx-I(A), RechRdx-I(25)
Level 26: Dragon's Tail -- Erad-Dmg(A), Erad-Acc/Rchg(27), Erad-Dmg/Rchg(33), Erad-Acc/Dmg/Rchg(36), Erad-Acc/Dmg/EndRdx/Rchg(46)
Level 28: Air Superiority -- C'ngImp-Acc/Dmg(A), C'ngImp-Dmg/Rchg(29), C'ngImp-Acc/Dmg/Rchg(37), C'ngImp-Acc/Dmg/EndRdx(46), C'ngImp-Dmg/EndRdx(46)
Level 30: Boxing -- Empty(A)
Level 32: Eagles Claw -- T'Death-Acc/Dmg(A), T'Death-Dmg/EndRdx(33), T'Death-Dmg/Rchg(33), T'Death-Acc/Dmg/EndRdx(37), T'Death-Dmg/EndRdx/Rchg(45)
Level 35: Oppressive Gloom -- Stpfy-Stun/Rng(A), Stpfy-Acc/Stun/Rchg(48)
Level 38: Soul Transfer -- RechRdx-I(A), RechRdx-I(39), RechRdx-I(39)
Level 41: Tough -- S'fstPrt-ResKB(A), ResDam-I(42)
Level 44: Spirit Shark -- Decim-Acc/Dmg(A), Decim-Dmg/EndRdx(45), Decim-Dmg/Rchg(45), Decim-Acc/EndRdx/Rchg(48), Decim-Acc/Dmg/Rchg(48)
Level 47: Hibernate -- RechRdx-I(A)
Level 49: Spirit Shark Jaws -- Dev'n-Acc/Dmg(A), Dev'n-Dmg/Rchg(50), Dev'n-Acc/Dmg/Rchg(50), Lock-%Hold(50)
Level 0: Freedom Phalanx Reserve
Level 0: Portal Jockey
Level 0: Task Force Commander
Level 0: The Atlas Medallion
Level 50: Cardiac Core Boost
------------
Level 1: Brawl -- Empty(A)
Level 1: Critical Hit
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 2: Swift -- Empty(A)
Level 2: Health -- Numna-Regen/Rcvry+(A), Numna-Heal(9), Mrcl-Rcvry+(11)
Level 2: Hurdle -- Empty(A)
Level 2: Stamina -- P'Shift-End%(A), P'Shift-EndMod(7)
Level 4: Ninja Run

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