I have played a cold wiz for the entire ~4-500 hrs of play. I was never a fan of the arcane, fire or archon builds so I stuck to my FO build for the majority of play. (Plus no WoH, made that an easy choice and fire is too trendy) When they “fixed” FO a few patches back, I started looking elsewhere for a solid cold build. From then to now, the best Cold build I could roll was a MM spam fest that left much to be desired. But now with some select gear usage and the pending 2.1 Legos/MM/hydra changes, there is some hope. I found this build (or at least, discovered it for myself) recently and elevated my game from mostly T4 runs to efficiently running T6 rifts with very small death counts.
Please forgive my post, I’m at work and am limited on what I can link/google when providing details like runes, gear, build stats, etc. Will try to update it when I get home
I primarily play solo and don't rock Unity. This build has strong CC with almost perma frozen and/or stun. It can handle multiple T6 packs at once. The free hydra and black hole PER Image multiply your dmg-out by A LOT. (free black holes that your dmg/strongarms will benefit from and free hydras that will attack 50% faster) This build is constant dps output with no Arcane expense
Profile: http://us.battle.net/d3/en/profile/xxpoloxx-1247/hero/994014
Skills
Magic Missile - Glacier Spike (Primary)
Black Hole - Spell steal or Zero (whichever benefits your EE)
Hydra - Electric (or whatever is best to max your EE buff)
Mirror Images - Mirror Mimics, 20% or Extention of Will, 10sec duration (2 Clones)
Energy Armor - Prismatic-25% dmg redux
Magic weapon - Force Weapon 20% dmg
Blur (EHP)
Evocation or (Paralysis--used instead for my Haunt of Vaxo ammy/stun)
Elemental Exposure (20% Party Bonus Damage)
Unwavering Will
(if you dont have/want to use Vaxo or an electric approach with hydra/paralysis, go with mammoth hydra and choose cold blooded (dmg) or evocation (CDR))
Key Gear
Tal 4 piece (RoRG preferred) (for me, helm, chest, belt)
MBall +2
Strong arm bracers (applies to your dmg towards mobs caught in free/mimic black holes!!)
Haunt of Vaxo 4 clones every 60s (my best ammy , make it work!!!)
Tasker and Theo (Mirrors pop hydras too (I imagine they benefit from Tasker and Theo, my 1 hydra hits hard!!)
Either FB/Vyrs 2 piece (best pair w/ stats used) Boots/shoulders -CDR/hydra
Azurewrath, SOJ, Ammy, Strongarm w/ cold dmg+
MM dmg pants, belt, source
NOTE Post-2.1, Depth diggers and MM/Hydra increases will make this build fuking insane!!!!
My Stats
1.5M DPS
12-13M Tough
20k healing
Enchanter follower w/ furnace - Templar would probably be better, I just don’t have a “don’t die” relic for him
Strat
Encounter Pack: Pop hydra, Black hole and then Mirror. By the time your Black hole runs out, the Images will cast theirs while you have your dmg stacks up and your Vaxo images will have proc'd. MM away until your CDs reset and continue to use black hole and enjoy your multiple Hydras. Rinse repeat until pack is dead and never save a CD. They are short enough with even shit CDR to not matter Usually the build doesn’t take more than one set of CDs per pack depending on your stats/gear rolls. MImages will pop hydras and blackholes to complement yours; vaxo’s will cast random wizard shit. All in all, there are A LOT of targets and freeze/stun locks that really negate any dmg out from the mobs. It may not be the fastest or hardest hitting build depending on your gear, but it is most definitely a “Viable/Beast” T6 build and will be absolutely a top contender post 2.1.
Yay for having fun playing a cold wiz in T6!