Anyone? Beuller? 
Well, 20+ views and no replies must mean it isn't horrible. So, off to build it! 
I had something to post but it got eaten 
Short and sweet, put heal set IO mules in health not frostworks. Frostworks works, but it's kind of situational. The big exception I found was when my Ice/cold corruptor used Frostworks on a Dark/Dark Brute.
Your are slotting heavily for -recharge. IMHO, I would fit in hasten, too.
Triumphant Defenders Forever
Psylenz FF/Psi, ArticQuark Storm/Rad, Symon BarSisyphus Bots/psn, Max VanSydow Thugs/Dk, Cyclone Symon Bots/stm, Blue Loki Ice/Cd, Widow 46526
HelinCarnate:OMG it is so terrible. I have the option to take 3 more powers but no additional slots. Boo F'ing hoo.
You have enough global accuracy bonuses to not put any accuracy in Benumb and still have a 95% chance to hit vs +4's.
Here is my build. It could use the advice mentioned above, but I don't care enough to respec to do it. It features perma Benumb, Heat Loss, and a pet, and enough defense to not feel squishy. My first priority is debuffing, so I make sure to keep Benumb and resistance debuffs on the enemies as much as possible. Benumb is low on accuracy, but if I use Sleet before Benumb, it has a 90% chance to hit vs +4's, assuming no other teammates debuff defenses. I figured the best attack chain for debuffing and swapped in Howl. I posted my math for the best debuff chain here.
Code:
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Your really close to being softcapped to ranged as well, which will help you from getting held a lot and helps a lot for my build I've found. Here is my cold/rad/mace build for your consideration. Benumb/heat loss/hasten/pet are all pretty close (4-6 seconds i think) from being perma, no purps/pvps so if budget allows you could get there.
Hero Plan by Mids' Hero Designer 1.92
http://www.cohplanner.com/
Click this DataLink to open the build!
Test2: Level 50 Mutation Defender
Primary Power Set: Cold Domination
Secondary Power Set: Radiation Blast
Power Pool: Flight
Power Pool: Fighting
Power Pool: Leadership
Power Pool: Speed
Ancillary Pool: Mace Mastery
Hero Profile:
Level 1: Infrigidate -- Acc-I:50(A)
Level 1: Neutrino Bolt -- Decim-Acc/Dmg:40(A), Decim-Dmg/EndRdx:40(3), Decim-Dmg/Rchg:40(3), Decim-Acc/EndRdx/Rchg:40(5), Decim-Acc/Dmg/Rchg:40(5), Achilles-DefDeb:20(27)
Level 2: Ice Shield -- LkGmblr-Def/EndRdx:50(A), LkGmblr-Def:50(7), LkGmblr-Rchg+:50(7), LkGmblr-Def/EndRdx/Rchg:50(27)
Level 4: Snow Storm -- EndRdx-I:50(A)
Level 6: Glacial Shield -- LkGmblr-Rchg+:50(A), LkGmblr-Def:50(9), LkGmblr-Def/EndRdx:50(9), LkGmblr-Def/EndRdx/Rchg:50(29)
Level 8: X-Ray Beam -- Decim-Acc/Dmg:40(A), Decim-Dmg/EndRdx:40(11), Decim-Dmg/Rchg:40(11), Decim-Acc/EndRdx/Rchg:40(13), Decim-Acc/Dmg/Rchg:40(13)
Level 10: Hover -- Zephyr-Travel/EndRdx:50(A), Zephyr-ResKB:50(15), Ksmt-ToHit+:30(15)
Level 12: Arctic Fog -- RedFtn-Def/EndRdx:50(A), RedFtn-Def/Rchg:50(17), RedFtn-EndRdx/Rchg:50(17), RedFtn-Def/EndRdx/Rchg:50(19), RedFtn-Def:50(19), RedFtn-EndRdx:50(21)
Level 14: Fly -- Zephyr-Travel:50(A), Zephyr-ResKB:50(50)
Level 16: Boxing -- Stpfy-Acc/Rchg:50(A), Stpfy-EndRdx/Stun:50(21), Stpfy-Acc/EndRdx:20(23), Stpfy-Stun/Rng:50(23), Stpfy-KB%:40(25), Stpfy-Acc/Stun/Rchg:50(25)
Level 18: Assault -- EndRdx-I:50(A)
Level 20: Tough -- S'fstPrt-ResDam/Def+:30(A), S'fstPrt-ResKB:30(29)
Level 22: Weave -- RedFtn-Def/EndRdx:50(A), RedFtn-Def/Rchg:50(31), RedFtn-EndRdx/Rchg:50(31), RedFtn-Def/EndRdx/Rchg:50(31), RedFtn-Def:50(33), RedFtn-EndRdx:50(33)
Level 24: Benumb -- Acc-I:50(A), RechRdx-I:50(33), RechRdx-I:50(34), RechRdx-I:50(34)
Level 26: Sleet -- Achilles-ResDeb%:20(A), RechRdx-I:50(34), RechRdx-I:50(36), RechRdx-I:50(36)
Level 28: Cosmic Burst -- Thundr-Acc/Dmg:50(A), Thundr-Dmg/EndRdx:50(36), Thundr-Dmg/Rchg:50(37), Thundr-Acc/Dmg/Rchg:50(37), Thundr-Acc/Dmg/EndRdx:50(37), Thundr-Dmg/EndRdx/Rchg:50(39)
Level 30: Maneuvers -- LkGmblr-Def:50(A), LkGmblr-Def/EndRdx:50(39), LkGmblr-Rchg+:50(39)
Level 32: Heat Loss -- Efficacy-EndMod/Acc:50(A), Efficacy-EndMod/Rchg:50(40), Efficacy-Acc/Rchg:50(40), Efficacy-EndMod/Acc/Rchg:50(43)
Level 35: Neutron Bomb -- Posi-Acc/Dmg:50(A), Posi-Dmg/EndRdx:50(40), Posi-Dmg/Rchg:50(42), Posi-Dmg/Rng:50(42), Posi-Acc/Dmg/EndRdx:50(42)
Level 38: Hasten -- RechRdx-I:50(A), RechRdx-I:50(43)
Level 41: Scorpion Shield -- HO:Cyto(A), HO:Cyto(43)
Level 44: Web Cocoon -- BasGaze-Acc/Hold:19(A), BasGaze-Acc/Rchg:30(45), BasGaze-Rchg/Hold:30(45), BasGaze-EndRdx/Rchg/Hold:30(45)
Level 47: Summon Disruptor -- ExRmnt-Acc/Rchg:50(A), ExRmnt-Acc/Dmg:50(48), ExRmnt-Dmg/EndRdx:50(48), ExRmnt-Acc/Dmg/Rchg:50(48), ExRmnt-EndRdx/Dmg/Rchg:50(50), ExRmnt-+Res(Pets):50(50)
Level 49: Vengeance -- LkGmblr-Rchg+:50(A)
Level 0: Freedom Phalanx Reserve
Level 0: Portal Jockey
Level 0: Task Force Commander
Level 0: The Atlas Medallion
Level 50: Spiritual Radial Boost
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Clrty-Stlth:50(A)
Level 2: Rest -- Empty(A)
Level 1: Vigilance
Level 4: Ninja Run
Level 2: Swift -- Flight-I:50(A)
Level 2: Hurdle -- Jump-I:50(A)
Level 2: Health -- Mrcl-Rcvry+:40(A), Numna-Regen/Rcvry+:50(46)
Level 2: Stamina -- P'Shift-EndMod:50(A), P'Shift-EndMod/Rchg:50(46), P'Shift-End%:50(46)
Code:
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A word of explanation: I mainly play melee toons. I have tons of scrappers and tanks and even a few brutes. I like mixing it up and hitting things.
That said, I also like contributing to teams. So, I've been starting up some defenders. I'm not looking for solo builds, or leveling builds. I want a toon that I can swap onto to bring the most buff/debuff utility, while still being 'durable enough' to not make me pull out my hair in rage.
So, here's a build. I make no claims that its any good, I'm not good at defenders. But, it seems to me like it covers the basics, it's pretty cheap, and it softcaps S/L/E, which should hopefully keep it alive a while longer under my hamfistedly brutal control.
If anyone has any advice, please let me know! For example, have I skipped anything essential, is my slotting on some of the buffs 'strange', have I gimped myself in any way? I know the end usage is 'not good' but I was thinking that Heat Loss might cover that gap?
Let me know what ya'll think:
Hero Plan by Mids' Hero Designer 1.92
http://www.cohplanner.com/
Click this DataLink to open the build!
Winters Maiden_I19: Level 50 Magic Defender
Primary Power Set: Cold Domination
Secondary Power Set: Sonic Attack
Power Pool: Leaping
Power Pool: Leadership
Power Pool: Fighting
Power Pool: Concealment
Ancillary Pool: Mace Mastery
Hero Profile:
Level 1: Ice Shield -- RedFtn-Def/EndRdx(A), RedFtn-Def/EndRdx/Rchg(7), LkGmblr-Rchg+(15), Aegis-ResDam/EndRdx(23), Aegis-ResDam/Rchg(37), Aegis-ResDam/EndRdx/Rchg(43)
Level 1: Shriek -- Thundr-Dmg/EndRdx/Rchg(A), Thundr-Acc/Dmg/EndRdx(3), Thundr-Acc/Dmg(9), Thundr-Dmg/EndRdx(34), Thundr-Dmg/Rchg(37), Thundr-Acc/Dmg/Rchg(46)
Level 2: Scream -- Thundr-Dmg/EndRdx/Rchg(A), Thundr-Acc/Dmg/EndRdx(3), Thundr-Acc/Dmg(9), Thundr-Dmg/EndRdx(33), Thundr-Dmg/Rchg(37), Thundr-Acc/Dmg/Rchg(46)
Level 4: Howl -- Posi-Dam%(A), Posi-Acc/Dmg/EndRdx(5), Posi-Acc/Dmg(5), JavVoll-Acc/End/Rech(31), Posi-Dmg/Rchg(31), Posi-Dmg/Rng(36)
Level 6: Glacial Shield -- RedFtn-Def/EndRdx(A), RedFtn-Def/EndRdx/Rchg(7), LkGmblr-Rchg+(15), Aegis-ResDam/EndRdx(23), Aegis-ResDam/EndRdx/Rchg(36), Aegis-Psi/Status(46)
Level 8: Frostwork -- Numna-Regen/Rcvry+(A), Numna-Heal/Rchg(11), Numna-Heal/EndRdx/Rchg(11), Dct'dW-Heal/Rchg(40)
Level 10: Combat Jumping -- Ksmt-ToHit+(A), LkGmblr-Rchg+(40)
Level 12: Arctic Fog -- LkGmblr-Def/EndRdx(A), LkGmblr-Def/EndRdx/Rchg(13), LkGmblr-Def(13), RedFtn-Def/EndRdx(43)
Level 14: Super Jump -- Winter-ResSlow(A)
Level 16: Shout -- Thundr-Dmg/EndRdx/Rchg(A), Thundr-Acc/Dmg/EndRdx(17), Thundr-Acc/Dmg(17), Thundr-Dmg/EndRdx(31), Thundr-Dmg/Rchg(34), Thundr-Acc/Dmg/Rchg(43)
Level 18: Benumb -- RechRdx-I(A), RechRdx-I(19), Acc-I(19), Acc-I(34)
Level 20: Maneuvers -- LkGmblr-Def/EndRdx(A), LkGmblr-Def/EndRdx/Rchg(21), LkGmblr-Rchg+(21), LkGmblr-EndRdx/Rchg(39)
Level 22: Kick -- Empty(A)
Level 24: Tough -- Aegis-ResDam/EndRdx(A), Aegis-ResDam/EndRdx/Rchg(25), Aegis-EndRdx/Rchg(25)
Level 26: Weave -- LkGmblr-Def/EndRdx/Rchg(A), LkGmblr-Def/EndRdx(27), LkGmblr-Def(27)
Level 28: Sleet -- AnWeak-Acc/Rchg/EndRdx(A), AnWeak-DefDeb(29), AnWeak-Acc/DefDeb(29), AnWeak-Acc/Rchg(39), AnWeak-DefDeb/EndRdx/Rchg(50)
Level 30: Grant Invisibility -- RedFtn-Def/EndRdx/Rchg(A)
Level 32: Heat Loss -- Efficacy-EndMod/Acc/Rchg(A), Efficacy-EndMod/Rchg(33), Efficacy-Acc/Rchg(33), Efficacy-EndMod/Acc(39), TmpRdns-EndRdx/Rchg/Slow(50)
Level 35: Tactics -- GSFC-ToHit/EndRdx(A), GSFC-ToHit/Rchg/EndRdx(36), GSFC-Rchg/EndRdx(50)
Level 38: Invisibility -- LkGmblr-Rchg+(A), LkGmblr-Def/EndRdx(40)
Level 41: Infrigidate -- LdyGrey-DefDeb/EndRdx(A), LdyGrey-DefDeb/Rchg/EndRdx(42), LdyGrey-DefDeb/Rchg(42), AnWeak-Acc/DefDeb(42)
Level 44: Scorpion Shield -- LkGmblr-Def(A), LkGmblr-Def/EndRdx(45), LkGmblr-Def/EndRdx/Rchg(45), LkGmblr-EndRdx/Rchg(45)
Level 47: Web Cocoon -- G'Wdw-Acc/Hold/Rchg(A), G'Wdw-Hold/Rng(48), G'Wdw-EndRdx/Hold(48), G'Wdw-Acc/Rchg(48)
Level 49: Vengeance -- RedFtn-Def/Rchg(A)
Level 50: Spiritual Total Radial Revamp
Level 0: Freedom Phalanx Reserve
Level 0: Portal Jockey
Level 0: Task Force Commander
Level 0: The Atlas Medallion
------------
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 -- Mrcl-Rcvry+(A)
Level 2: Hurdle -- Jump-I(A)
Level 2: Stamina -- P'Shift-End%(A)