Spine/Regen I-19 Respec and build advice

Hi all. This is my current build. Ive been holding off on doing anything until I19 came out. Id like to get my defenses up a bit. Any suggestions will be greatly appreciated.
p.s. I realize some of the IOs are misplaced etc. I just popped em in someplace to hold it while i respec
Thanks

Hero Plan by Mids' Hero Designer 1.90
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mauler: Level 50 Mutation Scrapper
Primary Power Set: Spines
Secondary Power Set: Regeneration
Power Pool: Leaping
Power Pool: Speed
Power Pool: Fighting
Ancillary Pool: Blaze Mastery

Hero Profile:
Level 1: Lunge -- KntkC'bat-Acc/Dmg:35(A), KntkC'bat-Dmg/EndRdx:35(3), KntkC'bat-Dmg/Rchg:35(3), KntkC'bat-Dmg/EndRdx/Rchg:35(27)
Level 1: Fast Healing -- Mrcl-Rcvry+:40(A), Numna-Regen/Rcvry+:40(5), Numna-Heal:40(5)
Level 2: Reconstruction -- Dct'dW-Heal:50(A), Dct'dW-Rchg:50(7), Dct'dW-Heal/EndRdx:50(7), Dct'dW-Heal/Rchg:50(36), Dct'dW-Heal/EndRdx/Rchg:50(36)
Level 4: Quick Recovery -- EndMod(A), EndMod(9), EndMod(9), Empty(31), Empty(31), Empty(31)
Level 6: Spine Burst -- Oblit-Dmg:50(A), Oblit-Acc/Rchg:50(11), Oblit-Dmg/Rchg:50(11), Oblit-Acc/Dmg/Rchg:50(27), Oblit-Acc/Dmg/EndRdx/Rchg:50(39), Oblit-%Dam:50(39)
Level 8: Combat Jumping -- LkGmblr-Rchg+:50(A), LkGmblr-Def:50(13)
Level 10: Dull Pain -- Dct'dW-Heal/EndRdx:50(A), Dct'dW-EndRdx/Rchg:50(15), Dct'dW-Heal/Rchg:50(15), Dct'dW-Rchg:50(23), Dct'dW-Heal:50(23)
Level 12: Hasten -- RechRdx-I:50(A), RechRdx-I:50(13), RechRdx-I:50(19)
Level 14: Super Jump -- Zephyr-Travel:50(A)
Level 16: Integration -- Dct'dW-Heal:50(A), Dct'dW-Heal/EndRdx:50(17), Dct'dW-Heal/Rchg:50(17), Dct'dW-Heal/EndRdx/Rchg:50(25), Dct'dW-Rchg:50(25)
Level 18: Build Up -- GSFC-Build%:21(A), GSFC-ToHit:21(19), GSFC-ToHit/Rchg:50(34)
Level 20: Impale -- Decim-Acc/Dmg:40(A), Decim-Dmg/EndRdx:40(21), Decim-Dmg/Rchg:40(21), Decim-Acc/EndRdx/Rchg:40(37), Decim-Acc/Dmg/Rchg:40(37)
Level 22: Quills -- Sciroc-Dam%:50(A), Sciroc-Acc/Dmg/EndRdx:50(40), Sciroc-Acc/Dmg:50(40), Sciroc-Dmg/EndRdx:50(42), Sciroc-Dmg/Rchg:50(42), Sciroc-Acc/Rchg:50(42)
Level 24: Boxing -- T'Death-Acc/Dmg:30(A), T'Death-Dmg/EndRdx:40(43), T'Death-Dmg/Rchg:40(43), T'Death-Acc/Dmg/EndRdx:40(43)
Level 26: Ripper -- Oblit-Dmg:50(A), Oblit-Acc/Rchg:50(34), Oblit-Dmg/Rchg:50(34), Oblit-Acc/Dmg/Rchg:50(37), Oblit-Acc/Dmg/EndRdx/Rchg:50(39), Oblit-%Dam:50(46)
Level 28: Instant Healing -- RechRdx(A), RechRdx(29), RechRdx(29)
Level 30: Tough -- RctvArm-ResDam:40(A), RctvArm-ResDam/EndRdx:40(33), RctvArm-ResDam/Rchg:40(33), RctvArm-ResDam/EndRdx/Rchg:40(40)
Level 32: Weave -- EndRdx(A), DefBuff(33)
Level 35: Throw Spines -- Posi-Acc/Dmg/EndRdx:50(A), Posi-Acc/Dmg:50(36), Posi-Dmg/EndRdx:50(45), Posi-Dmg/Rchg:50(45), Posi-Dmg/Rng:50(45)
Level 38: Moment of Glory -- LkGmblr-Rchg+:50(A), RctvArm-ResDam:40(46)
Level 41: Char -- Acc(A), EndRdx(46), Hold(48), Hold(48)
Level 44: Fire Blast -- Acc-I:50(A)
Level 47: Fire Ball -- Acc(A), Acc(48), EndRdx(50), Dmg(50), Dmg(50)
Level 49: Resilience -- S'fstPrt-ResDam/Def+:30(A)
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- EndRdx(A)
Level 2: Rest -- RechRdx(A)
Level 1: Critical Hit
Level 6: Ninja Run
Level 2: Swift -- Run(A)
Level 2: Hurdle -- Jump(A)
Level 2: Health -- Heal(A)
Level 2: Stamina -- P'Shift-End%:50(A)

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I posted in a Katana / Regen thread. Search my posts for that thread to see a /Regen build that can stand well with defense. It basically involves taking a lot of recharge and cycling MoG, Shadow Meld, and Shadow Meld again.