Spines/Invuln Build Critique

I'm trying to revamp one of my older scrappers, a Spines/Invuln who's been around for years. She's still got inherent Fitness at the moment so a revamp is definitely in order. I started this with the intent of softcapping defenses, but it's turned out to be harder to do that than I thought. The build below didn't make the softcap (unless you have a crazy number of melee mobs for Invinc) but it's pretty close on S/L/E/N. Anyone have any suggestions for improvements? Thanks in advance!

Hero Plan by Mids' Hero Designer 1.952
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Death.Angel-PLAN: Level 50 Science Scrapper
Primary Power Set: Spines
Secondary Power Set: Invulnerability
Power Pool: Speed
Power Pool: Leaping
Power Pool: Leadership
Power Pool: Fighting
Ancillary Pool: Blaze Mastery

Hero Profile:
Level 1: Lunge -- KntkC'bat-Acc/Dmg(A), KntkC'bat-Dmg/Rchg(3), KntkC'bat-Dmg/EndRdx/Rchg(3), KntkC'bat-Knock%(5)
Level 1: Resist Physical Damage -- S'fstPrt-ResKB(A)
Level 2: Spine Burst -- Dmg-I(A), Sciroc-Acc/Dmg/EndRdx(43), Erad-Dmg/Rchg(43), Erad-Acc/Dmg/Rchg(45), Erad-%Dam(45)
Level 4: Dull Pain -- Dct'dW-EndRdx/Rchg(A), Dct'dW-Heal/Rchg(9), Dct'dW-Heal/EndRdx/Rchg(13), Dct'dW-Heal(13), Dct'dW-Rchg(15)
Level 6: Build Up -- GSFC-ToHit(A), GSFC-ToHit/Rchg(7), GSFC-ToHit/Rchg/EndRdx(9), GSFC-Rchg/EndRdx(11), GSFC-ToHit/EndRdx(40), GSFC-Build%(42)
Level 8: Temp Invulnerability -- RctvArm-ResDam/EndRdx(A), RctvArm-ResDam/Rchg(15), RctvArm-ResDam/EndRdx/Rchg(19), RctvArm-ResDam(23)
Level 10: Hasten -- RechRdx-I(A), RechRdx-I(11)
Level 12: Combat Jumping -- Krma-ResKB(A), LkGmblr-Def/Rchg(27), LkGmblr-Def(33), LkGmblr-Rchg+(33)
Level 14: Maneuvers -- LkGmblr-Def/EndRdx(A), LkGmblr-Def/EndRdx/Rchg(34), LkGmblr-Def(36), LkGmblr-Rchg+(45)
Level 16: Unyielding -- RctvArm-ResDam/EndRdx(A), RctvArm-ResDam/Rchg(17), RctvArm-ResDam/EndRdx/Rchg(17), RctvArm-ResDam(19)
Level 18: Quills -- C'ngBlow-Dmg/EndRdx(A), Sciroc-Acc/Dmg/EndRdx(34), M'Strk-Dmg/EndRdx(36)
Level 20: Resist Energies -- RctvArm-ResDam/EndRdx(A), RctvArm-ResDam/Rchg(21), RctvArm-ResDam/EndRdx/Rchg(21), RctvArm-ResDam(23)
Level 22: Boxing -- KntkC'bat-Acc/Dmg(A), KntkC'bat-Dmg/EndRdx(36), KntkC'bat-Dmg/Rchg(37), KntkC'bat-Knock%(37)
Level 24: Tough -- RctvArm-ResDam/EndRdx(A), RctvArm-ResDam/Rchg(25), RctvArm-ResDam/EndRdx/Rchg(25), RctvArm-ResDam(27)
Level 26: Ripper -- Dmg-I(A), Sciroc-Acc/Dmg/EndRdx(40), Erad-Dmg/Rchg(46), Erad-Acc/Dmg/EndRdx/Rchg(46), Erad-%Dam(48)
Level 28: Invincibility -- LkGmblr-Def/EndRdx(A), LkGmblr-Def/EndRdx/Rchg(29), LkGmblr-Def(29), LkGmblr-Rchg+(33)
Level 30: Weave -- LkGmblr-Def/EndRdx(A), LkGmblr-Def/EndRdx/Rchg(31), LkGmblr-Def(31), LkGmblr-Rchg+(31)
Level 32: Throw Spines -- Posi-Acc/Dmg(A), Posi-Dmg/EndRdx(37), Posi-Dmg/Rchg(39), Posi-Dmg/Rng(39), Posi-Acc/Dmg/EndRdx(40)
Level 35: Super Speed -- Winter-ResSlow(A)
Level 38: Tough Hide -- LkGmblr-Def(A), LkGmblr-Rchg+(39), DefBuff-I(43)
Level 41: Resist Elements -- Aegis-ResDam/EndRdx(A), Aegis-ResDam(42), Aegis-Psi/Status(42)
Level 44: Confront -- Mocking-Taunt(A), Mocking-Taunt/Rchg(46), Mocking-Rchg(48), Mocking-Taunt/Rchg/Rng(50), Mocking-Acc/Rchg(50), Mocking-Taunt/Rng(50)
Level 47: Char -- BasGaze-Acc/Hold(A), BasGaze-EndRdx/Rchg/Hold(48)
Level 49: Unstoppable -- ImpArm-ResPsi(A)
Level 50: Nerve Partial Radial Revamp
------------
Level 2: Swift -- Run-I(A)
Level 2: Health -- Mrcl-Rcvry+(A), Numna-Regen/Rcvry+(34)
Level 2: Hurdle -- Jump-I(A)
Level 2: Stamina -- P'Shift-EndMod(A), P'Shift-End%(5), EndMod-I(7)
Level 1: Brawl -- Acc-I(A)
Level 1: Critical Hit
Level 1: Sprint -- ULeap-Stlth(A)
Level 2: Rest -- RechRdx-I(A)
Level 4: Ninja Run
------------
Set Bonus Totals:

• 2.5% DamageBuff(Smashing)
• 2.5% DamageBuff(Lethal)
• 2.5% DamageBuff(Fire)
• 2.5% DamageBuff(Cold)
• 2.5% DamageBuff(Energy)
• 2.5% DamageBuff(Negative)
• 2.5% DamageBuff(Toxic)
• 2.5% DamageBuff(Psionic)
• 16.25% Defense(Smashing)
• 16.25% Defense(Lethal)
• 7.5% Defense(Fire)
• 7.5% Defense(Cold)
• 15% Defense(Energy)
• 15% Defense(Negative)
• 10% Defense(Melee)
• 9.38% Defense(Ranged)
• 5.63% Defense(AoE)
• 5.4% Max End
• 36% Enhancement(Accuracy)
• 56.25% Enhancement(RechargeTime)
• 4% Enhancement(Heal)
• 10% FlySpeed
• 125.5 HP (9.37%) HitPoints
• 10% JumpHeight
• 10% JumpSpeed
• Knockback (Mag -8)
• Knockup (Mag -8)
• MezResist(Held) 2.75%
• MezResist(Immobilize) 9.9%
• MezResist(Terrorized) 2.2%
• 5% (0.08 End/sec) Recovery
• 50% (2.79 HP/sec) Regeneration
• 20% ResEffect(FlySpeed)
• 20% ResEffect(RechargeTime)
• 20% ResEffect(RunSpeed)
• 2.84% Resistance(Fire)
• 2.84% Resistance(Cold)
• 6% Resistance(Psionic)
• 15% RunSpeed

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Well, I don't currently have access to Mids because I'm not on my own computer. Just a quick glance shows that you have the wrong Steadfast IO in RPD. Fixing that will give you an additional 3% just by itself. In my experience, it's really hard to get a /Invuln Scrapper to be softcapped to all but Psi unless you make some big sacrifices. However, it's usually sufficient to just have S/L since you aren't tanking for the team. If you can get S/L/E you'll be golden for most content. S/L/E/N softcap is almost impossible to distinguish from S/L/E/N/F/C. I'll take a look at it when I get my on my own computer to see if I can find any other suggestions.

@Rorn ---- Blue Baron ---- Guardian

Thanks for pointing out the +Def IO, fixed that. Otherwise I left the build as-is and respec'd into it last night. Minimal testing shows that all is well so far. If anyone has any other suggestions I'd be happy to take note for the next respec!