sonic/cold or crying the mobs to a cold hell

here my build:
if anyone has a build which is effective as this but much cheaper plaese post it
Its mainly for doing ITF's

Villain Plan by Mids' Villain Designer 1,601
http://www.cohplanner.com/

Level 50 Magic Corruptor
Primary Power Set: Sonic Attacks
Secondary Power Set: Cold Domination
Power Pool: Leaping
Power Pool: Fitness
Power Pool: Speed
Power Pool: Fighting
Ancillary Pool: Leviathan Mastery

Villain Profile:
------------
Level 1: Shriek Decim-Acc/Dmg:40(A), Decim-Dmg/EndRdx:40(3), Decim-Dmg/Rchg:40(7), Decim-Acc/EndRdx/Rchg:40(15), Decim-Acc/Dmg/Rchg:40(19)
Level 1: Infrigidate TmpRdns-Acc/Slow:50(A), TmpRdns-Acc/EndRdx:50(5), TmpRdns-Rng/Slow:50(11), TmpRdns-EndRdx/Rchg/Slow:50(34), TmpRdns-Acc/Dmg/Slow:50(46)
Level 2: Scream Decim-Acc/Dmg:40(A), Decim-Dmg/EndRdx:40(3), Decim-Dmg/Rchg:40(7), Decim-Acc/EndRdx/Rchg:40(15), Decim-Acc/Dmg/Rchg:40(19)
Level 4: Snow Storm TmpRdns-Acc/Slow:50(A), TmpRdns-Acc/EndRdx:50(5), TmpRdns-Rng/Slow:50(11), TmpRdns-EndRdx/Rchg/Slow:50(31), TmpRdns-Acc/Dmg/Slow:50(43)
Level 6: Combat Jumping LkGmblr-Rchg+:50(A)
Level 8: Shout Decim-Acc/Dmg:40(A), Decim-Dmg/EndRdx:40(9), Decim-Dmg/Rchg:40(9), Decim-Acc/EndRdx/Rchg:40(34), Decim-Acc/Dmg/Rchg:40(43)
Level 10: Hurdle Jump-I:50(A)
Level 12: Hasten RechRdx-I:50(A), RechRdx-I:50(13), RechRdx-I:50(13)
Level 14: Super Jump Zephyr-ResKB:50(A)
Level 16: Frostwork Dct'dW-Heal:50(A), Dct'dW-Rchg:50(17), Dct'dW-Heal/Rchg:50(17), Dct'dW-Heal/EndRdx/Rchg:50(34), Dct'dW-Heal/EndRdx:50(43)
Level 18: Health Empty(A)
Level 20: Stamina Efficacy-EndMod:50(A), Efficacy-EndMod/Rchg:50(21), Efficacy-EndMod/Acc/Rchg:50(21), Efficacy-Acc/Rchg:50(37), Efficacy-EndMod/Acc:50(46), Efficacy-EndMod/EndRdx:50(46)
Level 22: Arctic Fog LkGmblr-Rchg+:50(A), TtmC'tng-ResDam:50(23), TtmC'tng-EndRdx:50(23), TtmC'tng-ResDam/EndRdx:50(31), TtmC'tng-ResDam/EndRdx/Rchg:50(31)
Level 24: Ice Shield LkGmblr-Rchg+:50(A), LkGmblr-Def:50(25), LkGmblr-Def/EndRdx:50(25)
Level 26: Glacial Shield LkGmblr-Rchg+:50(A), LkGmblr-Def:50(27), LkGmblr-Def/EndRdx:50(27)
Level 28: Benumb RechRdx-I:50(A), RechRdx-I:50(29), Acc-I:50(29), Acc-I:50(37), RechRdx-I:50(40)
Level 30: Boxing Empty(A)
Level 32: Tough TtmC'tng-ResDam:50(A), TtmC'tng-EndRdx:50(33), TtmC'tng-ResDam/EndRdx:50(33), TtmC'tng-ResDam/EndRdx/Rchg:50(33)
Level 35: Sleet Posi-Acc/Dmg:50(A), Posi-Dmg/EndRdx:50(36), Posi-Acc/Dmg/EndRdx:50(36), Posi-Dmg/Rng:50(36), Posi-Dmg/Rchg:50(37)
Level 38: Heat Loss Efficacy-EndMod:50(A), Efficacy-EndMod/Rchg:50(39), Efficacy-EndMod/Acc/Rchg:50(39), Efficacy-Acc/Rchg:50(39), Efficacy-EndMod/Acc:50(40), Efficacy-EndMod/EndRdx:50(40)
Level 41: Weave LkGmblr-Rchg+:50(A), LkGmblr-Def:50(42), LkGmblr-Def/EndRdx:50(42), LkGmblr-Def/EndRdx/Rchg:50(42)
Level 44: Shark Skin TtmC'tng-ResDam:50(A), TtmC'tng-EndRdx:50(45), TtmC'tng-ResDam/EndRdx:50(45), TtmC'tng-ResDam/EndRdx/Rchg:50(45)
Level 47: Dreadful Wail Oblit-Dmg:50(A), Oblit-Acc/Rchg:50(48), Oblit-%Dam:50(48), Oblit-Acc/Dmg/Rchg:50(48), Oblit-Dmg/Rchg:50(50)
Level 49: Amplify RechRdx-I:50(A), RechRdx-I:50(50), RechRdx-I:50(50)
------------
Level 1: Brawl Empty(A)
Level 1: Sprint Empty(A)
Level 2: Rest Empty(A)
Level 1: Scourge
------------
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)
8,55% Max End
4% Enhancement(Heal)
3% Enhancement(JumpHeight)
3% Enhancement(JumpSpeed)
3% Enhancement(FlySpeed)
27% Enhancement(Accuracy)
3% Enhancement(RunSpeed)
90% Enhancement(RechargeTime)
108,4 HP (10,1%) HitPoints
Knockback (Mag -4)
Knockup (Mag -4)
MezResist(Immobilize) 8,25%
MezResist(Sleep) 6,6%
MezResist(Stun) 8,8%
MezResist(Terrorized) 2,2%
8,5% (0,14 End/sec) Recovery
50% (2,24 HP/sec) Regeneration
2,84% Resistance(Fire)
2,84% Resistance(Cold)

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you don't need fighting

why not put the +end proc on stamina?

this build has extreme recharge ans stamina is slotted for it.
the char is for PvE

you need extremely high recharge. unless your trying to have heat loss up every second

my goalwas to get benumb perma but its the same