DM/Invuln build assistance

Looking for any advice from you forumites on my DM/Inv build I threw together. Not looking for anything super pricey, I have about a Billion influence to spend if the need is truly there I suppose...
Goals for the character.
Atleast Softcap to S/L, E would be nice but I'm happy with "one purple skittle from softcap"
Kinda partial to Fire Epic for extra AoE to fill the gap of AoE in DM, But am open to suggestions... (I mean looking at mids numbers, a saturated soul drain nets my Fireball hitting for 590, Can't argue with that)
Edit: I realise that Shadow maul being an attack is strangely slotted, But I need the +Def to S/L to softcap but if there is a way to make that up somewhere, I'm sure more milage could be had out of it as an attack slotted properly.
And thanks for any help/critique/suggestions...
Hero Plan by Mids' Hero Designer 1.953
http://www.cohplanner.com/

Click this DataLink to open the build!

Level 50 Magic Scrapper
Primary Power Set: Dark Melee
Secondary Power Set: Invulnerability
Power Pool: Fighting
Power Pool: Speed
Power Pool: Leaping
Ancillary Pool: Blaze Mastery

Hero Profile:
Level 1: Smite -- KntkC'bat-Acc/Dmg(A), KntkC'bat-Dmg/EndRdx(3), KntkC'bat-Dmg/Rchg(3), KntkC'bat-Dmg/EndRdx/Rchg(31)
Level 1: Resist Physical Damage -- S'fstPrt-ResDam/Def+(A)
Level 2: Temp Invulnerability -- RctvArm-ResDam/EndRdx(A), RctvArm-EndRdx/Rchg(11), RctvArm-ResDam/Rchg(13), RctvArm-ResDam/EndRdx/Rchg(13), RctvArm-ResDam(15)
Level 4: Dull Pain -- Dct'dW-Rchg(A), Dct'dW-Heal/Rchg(15), Dct'dW-Heal/EndRdx/Rchg(17), Dct'dW-Heal(40), Dct'dW-EndRdx/Rchg(40)
Level 6: Boxing -- KntkC'bat-Acc/Dmg(A), KntkC'bat-Dmg/EndRdx(7), KntkC'bat-Dmg/Rchg(7), KntkC'bat-Dmg/EndRdx/Rchg(9)
Level 8: Siphon Life -- KntkC'bat-Acc/Dmg(A), KntkC'bat-Dmg/EndRdx(36), KntkC'bat-Dmg/Rchg(37), KntkC'bat-Dmg/EndRdx/Rchg(37), Nictus-Heal/HP/Regen/Rchg(37), Nictus-Acc/Heal(40)
Level 10: Hasten -- RechRdx-I(A), RechRdx-I(11)
Level 12: Super Speed -- Run-I(A)
Level 14: Shadow Maul -- SipInsght-ToHitDeb/EndRdx/Rchg(A), SipInsght-Acc/Rchg(43), SipInsght-Acc/ToHitDeb(43), SipInsght-ToHitDeb(43), SipInsght-Acc/EndRdx/Rchg(46)
Level 16: Unyielding -- RctvArm-ResDam/EndRdx(A), RctvArm-ResDam/Rchg(17), RctvArm-EndRdx/Rchg(19), RctvArm-ResDam/EndRdx/Rchg(19), RctvArm-ResDam(27)
Level 18: Dark Consumption -- P'Shift-End%(A), P'Shift-EndMod(39), P'Shift-EndMod/Acc/Rchg(39), P'Shift-EndMod/Rchg(39)
Level 20: Tough -- RctvArm-ResDam/Rchg(A), RctvArm-ResDam/EndRdx/Rchg(21), RctvArm-ResDam(21), RctvArm-ResDam/EndRdx(25)
Level 22: Weave -- LkGmblr-Rchg+(A), LkGmblr-Def/EndRdx(23), LkGmblr-Def/Rchg(23), LkGmblr-Def(25)
Level 24: Combat Jumping -- LkGmblr-Rchg+(A)
Level 26: Soul Drain -- Erad-Acc/Rchg(A), Erad-Acc/Dmg/Rchg(27), Erad-Dmg/Rchg(31), GSFC-Build%(34), RechRdx-I(36)
Level 28: Invincibility -- LkGmblr-Def/EndRdx(A), LkGmblr-Rchg+(29), LkGmblr-Def/Rchg(29), LkGmblr-Def(31)
Level 30: Resist Elements -- S'fstPrt-ResKB(A)
Level 32: Midnight Grasp -- KntkC'bat-Acc/Dmg(A), KntkC'bat-Dmg/EndRdx(33), KntkC'bat-Dmg/Rchg(33), KntkC'bat-Dmg/EndRdx/Rchg(33), Mako-Dam%(34), T'Death-Dam%(34)
Level 35: Resist Energies -- S'fstPrt-ResKB(A)
Level 38: Tough Hide -- LkGmblr-Rchg+(A)
Level 41: Char -- NrncSD-Acc/Rchg(A), NrncSD-EndRdx/Hold(42), NrncSD-Acc/EndRdx(42), NrncSD-Hold/Rng(42), NrncSD-Acc/Hold/Rchg(46), NrncSD-Dam%(50)
Level 44: Fire Blast -- Thundr-Dmg/EndRdx/Rchg(A), Thundr-Acc/Dmg(45), Thundr-Dmg/EndRdx(45), Thundr-Dmg/Rchg(45), Thundr-Acc/Dmg/EndRdx(46), Thundr-Acc/Dmg/Rchg(50)
Level 47: Fire Ball -- Det'tn-Acc/Dmg(A), Det'tn-Dmg/EndRdx(48), Det'tn-Dmg/Rchg(48), Det'tn-Acc/Dmg/EndRdx(48), Det'tn-Dmg/EndRdx/Rng(50)
Level 49: Unstoppable -- RechRdx-I(A)
------------
Level 2: Swift -- Empty(A)
Level 2: Health -- Numna-Regen/Rcvry+(A), Mrcl-Rcvry+(9)
Level 2: Hurdle -- Empty(A)
Level 2: Stamina -- EndMod-I(A), P'Shift-End%(5), P'Shift-EndMod(5)
Level 1: Brawl -- Empty(A)
Level 1: Critical Hit
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 4: Ninja Run





http://www.cohplanner.com/mids/downl...CCE41FD9FED285

humbly...
dig for bass's build. you can likely scale back from there...
it really is pretty good.
I'll post my dm/inv brute; it's a different animal but may give you some ideas.

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Spc Bass, US Army reporting!

My build? I'm 6' 0" 245, 19 inch neck, 22 inch arms brown hair and blue eyes. Was once told I was the scariest looking medic someone had ever seen.
Now I'm a nurse.

Oh, different Bass? My bad.

Unless you are in love with the Acc ToHit-DeBuff set you have slotted in it, drop Shadow Maul. The rooted animation time, for me, made me hate that ability. I dropped it a few months back, and haven't missed it at all. I use my Patron Blast (Soul) ability as the seldom-needed 4th power in my attack chain, and feel much more efficient for it. My MG --> Siphon --> Smite chain works great.

thanks for all the replies and info, I have looked at bass' build and will take ideas from it and tweak it as needed for my budget.
Thanks again all!