Sleeping_IN

I read that you got one figured out after I started throwing one together but here it is anyway. No perma hasten but the defense is plenty beyond the soft cap for what you wanted especially stacked with the to-hit debuffs.

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

Click this DataLink to open the build!

Level 50 Magic Defender
Primary Power Set: Dark Miasma
Secondary Power Set: Dark Blast
Power Pool: Speed
Power Pool: Fighting
Power Pool: Leadership
Power Pool: Leaping
Ancillary Pool: Mace Mastery

Hero Profile:
Level 1: Twilight Grasp -- Theft-Acc/EndRdx/Heal(A), Theft-Acc/Heal(7), Theft-Heal/Rchg(19), Nictus-Acc/EndRdx/Heal/HP/Regen(36), Nictus-Heal/HP/Regen/Rchg(39)
Level 1: Dark Blast -- Thundr-Acc/Dmg(A), Thundr-Dmg/EndRdx(3), Thundr-Dmg/Rchg(7), Thundr-Acc/Dmg/Rchg(27), Thundr-Acc/Dmg/EndRdx(36), Thundr-Dmg/EndRdx/Rchg(39)
Level 2: Tar Patch -- RechRdx-I(A), RechRdx-I(3), TmpRdns-EndRdx/Rchg/Slow(11)
Level 4: Gloom -- Thundr-Acc/Dmg(A), Thundr-Dmg/EndRdx(5), Thundr-Dmg/Rchg(5), Thundr-Acc/Dmg/Rchg(25), Thundr-Acc/Dmg/EndRdx(36), Thundr-Dmg/EndRdx/Rchg(39)
Level 6: Super Speed -- Winter-ResSlow(A)
Level 8: Shadow Fall -- LkGmblr-Def/EndRdx(A), LkGmblr-Def/EndRdx/Rchg(9), LkGmblr-Def(29), ResDam-I(31), ResDam-I(37), S'fstPrt-ResDam/Def+(40)
Level 10: Hasten -- RechRdx-I(A), RechRdx-I(11), RechRdx-I(15)
Level 12: Fearsome Stare -- Cloud-ToHitDeb(A), Cloud-Acc/ToHitDeb(13), Cloud-Acc/Rchg(19), Cloud-ToHitDeb/EndRdx/Rchg(29), SipInsght-Acc/EndRdx/Rchg(34)
Level 14: Darkest Night -- HO:Enzym(A), HO:Enzym(15), HO:Enzym(43)
Level 16: Tenebrous Tentacles -- Posi-Acc/Dmg(A), Posi-Dmg/EndRdx(17), Posi-Dmg/Rchg(17), Posi-Dmg/Rng(23), Posi-Acc/Dmg/EndRdx(40), Enf'dOp-Acc/Immob/Rchg(43)
Level 18: Howling Twilight -- TmpRdns-EndRdx/Rchg/Slow(A)
Level 20: Night Fall -- Posi-Acc/Dmg(A), Posi-Dmg/EndRdx(21), Posi-Dmg/Rchg(21), Posi-Dmg/Rng(23), Posi-Acc/Dmg/EndRdx(40), SipInsght-Acc/EndRdx/Rchg(43)
Level 22: Kick -- Empty(A)
Level 24: Tough -- RctvArm-ResDam/EndRdx(A), RctvArm-ResDam/Rchg(25), RctvArm-ResDam/EndRdx/Rchg(37), RctvArm-ResDam(46)
Level 26: Weave -- LkGmblr-Def/EndRdx(A), LkGmblr-Rchg+(27), LkGmblr-Def/EndRdx/Rchg(37), LkGmblr-Def(50)
Level 28: Maneuvers -- LkGmblr-Def/EndRdx(A), LkGmblr-Rchg+(31), LkGmblr-Def/EndRdx/Rchg(50), LkGmblr-Def(50)
Level 30: Tactics -- GSFC-ToHit(A), GSFC-ToHit/Rchg(31), GSFC-ToHit/Rchg/EndRdx(34), GSFC-Rchg/EndRdx(48), GSFC-ToHit/EndRdx(48), GSFC-Build%(48)
Level 32: Dark Servant -- HO:Endo(A), HO:Endo(33), Nictus-Heal/HP/Regen/Rchg(33), DarkWD-ToHitDeb/EndRdx(33), DarkWD-ToHitdeb/Rchg/EndRdx(34)
Level 35: Assault -- EndRdx-I(A)
Level 38: Combat Jumping -- Krma-ResKB(A)
Level 41: Scorpion Shield -- LkGmblr-Def/EndRdx(A), LkGmblr-Def/EndRdx/Rchg(42), LkGmblr-Def(42), LkGmblr-Rchg+(42)
Level 44: Web Envelope -- Enf'dOp-Acc/Rchg(A), Enf'dOp-EndRdx/Immob(45), Enf'dOp-Acc/EndRdx(45), Enf'dOp-Immob/Rng(45), Enf'dOp-Acc/Immob/Rchg(46), Enf'dOp-Acc/Immob(46)
Level 47: Vengeance -- RedFtn-Def/Rchg(A)
Level 49: Super Jump -- SprngFt-EndRdx/Jump(A)
Level 50: Cardiac Core Boost
Level 0: Freedom Phalanx Reserve
Level 0: Portal Jockey
Level 0: Task Force Commander
Level 0: The Atlas Medallion
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Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 1: Vigilance
Level 2: Rest -- Empty(A)
Level 2: Swift -- Run-I(A)
Level 2: Health -- Numna-Regen/Rcvry+(A)
Level 2: Hurdle -- Jump-I(A)
Level 2: Stamina -- EndMod-I(A), EndMod-I(9), EndMod-I(13)
Level 4: Ninja Run