Build critique please...Dark/Ice

Wanted to see if this could be improved alot....

Hero Plan by Mids' Hero Designer 1.942
http://www.cohplanner.com/

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Level 50 Magic Defender
Primary Power Set: Dark Miasma
Secondary Power Set: Ice Blast
Power Pool: Speed
Power Pool: Leaping
Power Pool: Leadership
Power Pool: Concealment
Ancillary Pool: Soul Mastery

Hero Profile:
Level 1: Twilight Grasp -- Nictus-Acc/Heal(A), Nictus-Acc/EndRdx/Heal/HP/Regen(11), Nictus-Acc/EndRdx/Rchg(13), Nictus-Heal(13), DarkWD-ToHitDeb(17), DarkWD-ToHitDeb/Rchg(17)
Level 1: Ice Bolt -- GJ-Dam%(A), GJ-Acc/End/Rech(19), Apoc-Dam%(21), Apoc-Acc/Rchg(25), Apoc-Dmg/Rchg(25), HO:Nucle(27)
Level 2: Ice Blast -- GJ-Dam%(A), GJ-Acc/End/Rech(27), Dev'n-Acc/Dmg(29), Dev'n-Acc/Dmg/Rchg(29), Dev'n-Acc/Dmg/EndRdx/Rchg(31), ImpSwft-Dam%(31)
Level 4: Darkest Night -- DarkWD-ToHitDeb(A), DarkWD-ToHitDeb/EndRdx(36), DampS-ToHitDeb/Rchg(37), DampS-ToHitDeb/EndRdx(37), DampS-ToHitDeb/Rchg/EndRdx(50)
Level 6: Hasten -- RechRdx-I(A), RechRdx-I(7), RechRdx-I(7)
Level 8: Super Jump -- Zephyr-Travel(A), Zephyr-Travel/EndRdx(9), Zephyr-ResKB(11)
Level 10: Assault -- EndRdx-I(A)
Level 12: Aim -- AdjTgt-ToHit(A), AdjTgt-Rchg(37), AdjTgt-ToHit/Rchg(39), AdjTgt-ToHit/EndRdx/Rchg(39), AdjTgt-EndRdx/Rchg(39)
Level 14: Shadow Fall -- Krma-ResKB(A), S'fstPrt-ResKB(15), LkGmblr-Rchg+(15)
Level 16: Fearsome Stare -- HO:Lyso(A), HO:Lyso(40), DarkWD-ToHitDeb/EndRdx(40), DarkWD-ToHitdeb/Rchg/EndRdx(40)
Level 18: Grant Invisibility -- Krma-ResKB(A), LkGmblr-Rchg+(19)
Level 20: Invisibility -- Krma-ResKB(A), LkGmblr-Rchg+(21)
Level 22: Super Speed -- Zephyr-Travel(A), Zephyr-Travel/EndRdx(23), Zephyr-ResKB(23)
Level 24: Howling Twilight -- RechRdx-I(A), RechRdx-I(46)
Level 26: Tactics -- GSFC-ToHit(A), GSFC-ToHit/Rchg(43), GSFC-ToHit/EndRdx(43)
Level 28: Bitter Ice Blast -- GJ-Dam%(A), GJ-Acc/End/Rech(34), Dev'n-Acc/Dmg(34), Dev'n-Acc/Dmg/Rchg(34), Dev'n-Acc/Dmg/EndRdx/Rchg(36), ImpSwft-Dam%(36)
Level 30: Phase Shift -- RechRdx-I(A), RechRdx-I(31)
Level 32: Dark Servant -- Nictus-Acc/Heal(A), Nictus-Acc/EndRdx/Heal/HP/Regen(33), Nictus-Heal/HP/Regen/Rchg(33), DarkWD-ToHitDeb(33), DarkWD-ToHitDeb/Rchg(46)
Level 35: Combat Jumping -- LkGmblr-Rchg+(A)
Level 38: Acrobatics -- EndRdx-I(A)
Level 41: Dark Embrace -- S'fstPrt-ResKB(A), Aegis-Psi/Status(42), S'fstPrt-ResDam/EndRdx(42), S'fstPrt-ResDam/Def+(42), ImpSkn-Status(43)
Level 44: Soul Storm -- Apoc-Dmg(A), Apoc-Dmg/EndRdx(45), Apoc-Acc/Dmg/Rchg(45), UbrkCons-Dam%(45), GladNet-Dam%(46), HO:Nucle(50)
Level 47: Summon Mistress -- S'bndAl-Dmg(A), S'bndAl-Dmg/Rchg(48), S'bndAl-Acc/Dmg/Rchg(48), S'bndAl-Acc/Rchg(48)
Level 49: Power Boost -- RechRdx-I(A), RechRdx-I(50)
Level 0: Portal Jockey
Level 0: Task Force Commander
Level 0: The Atlas Medallion
Level 0: Freedom Phalanx Reserve
Level 50: Musculature Radial Paragon
Level 50: Reactive Radial Flawless Interface
Level 50: Rebirth Radial Epiphany
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 1: Vigilance
Level 2: Rest -- Empty(A)
Level 4: Ninja Run
Level 2: Swift -- Run-I(A)
Level 2: Health -- Numna-Regen/Rcvry+(A), Mrcl-Rcvry+(5), Panac-Heal/+End(9)
Level 2: Hurdle -- Jump-I(A)
Level 2: Stamina -- P'Shift-End%(A), Efficacy-EndMod(3), Efficacy-EndMod/Rchg(3), Efficacy-EndMod/Acc/Rchg(5)
------------
Set Bonus Totals:

• 8% DamageBuff(Smashing)
• 8% DamageBuff(Lethal)
• 8% DamageBuff(Fire)
• 8% DamageBuff(Cold)
• 8% DamageBuff(Energy)
• 8% DamageBuff(Negative)
• 8% DamageBuff(Toxic)
• 8% DamageBuff(Psionic)
• 3% Defense(Melee)
• 3% Defense(Smashing)
• 3% Defense(Lethal)
• 4.88% Defense(Fire)
• 4.88% Defense(Cold)
• 4.25% Defense(Energy)
• 4.25% Defense(Negative)
• 3% Defense(Psionic)
• 5.5% Defense(Ranged)
• 6.75% Defense(AoE)
• 1.8% Max End
• 22.5% Enhancement(Range)
• 27% Enhancement(Accuracy)
• 5% Enhancement(Heal)
• 35% Enhancement(RechargeTime)
• 5% FlySpeed
• 282.3 HP (27.8%) HitPoints
• 5% JumpHeight
• 5% JumpSpeed
• Knockback (Mag -28)
• Knockup (Mag -28)
• MezResist(Confused) 7.5%
• MezResist(Held) 7.5%
• MezResist(Immobilize) 7.5%
• MezResist(Sleep) 7.5%
• MezResist(Stun) 7.5%
• MezResist(Terrorized) 7.5%
• 10.5% (0.18 End/sec) Recovery
• 72% (3.05 HP/sec) Regeneration
• 1.26% Resistance(Energy)
• 1.26% Resistance(Negative)
• 3% Resistance(Psionic)
• 5% RunSpeed

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anyone?

I wouldn't waste my time with Ice Blast, it is at the bottom of the list for being at all viable in PvP, the damage is laughable, especially BiB, the "slow" secondary effect is pretty much non-existant....so yeah, wouldn't waste the time or money in IOing it out.