Unfortunately as it stands wizards will never efficiently be able to kill T6 Ghom like a WD/Barb/DH etc can. The best gear/spec will probably find yourself at 20 seconds if lucky stacked on elite damage while being even luckier to have a +20% fire maras for invuln so you are able to utilize force weapon and all other offensive buffs for max dmg. Most people will hit the 27-30 sec mark for Ghom T6, There is not much difference between going full magic missile conflag with like slow time +dmg/ias whatever with fire vyr archon. The only way I found to beat the 30 second kill time is to use enchantress follower with a Furnace and max IAS rings(16% IAS occy ring) 7% random ring, 7% necklace. Take any 2h Furnace and roll it with IAS, Your enchantress will attack pretty damn fast even if you dont have that 16% IAS occy ring and just a normal 7%. Then the BEST you can hope for is RNG for the furnace to proc to take extra chunks of his life away. It is a shame furnace and other 2handers aren't more viable to begin with otherwise you could double furnace him down. WD pets fastest ghom kill without a doubt probably followed close by barbs...I only switch back to pet when I run Ghom once or twice every week if that now, I literally can't find anything botting except salvaged souls so it is kind of depressing. But I have a wand of woh BiS geared wizard and pretty much BiS jade WD para 700+ with a DH in the works(just missing marauders chest + royal ring and a kridershot got windforce/strongarms til then) I am finding jade WD extremely fun, especially playing T6 rifts by hand. All the credit mostly goes to the bot really for getting 95% of the gear/levels. At a certain point you just don't need to bot anymore, Technically I should stop but I will probably keep going til I get banned just because I can run it on a secondary PC and only have to listen for my alarm every 16 hours to salvage 99.8% of drops. again totally off topic for ghom again but this is the best profile for ANYONE wanting to paragon level up/gold/salvage mats. Even if you are like para 200 or whatever and you happen to be a wizard or crusader or ungeared DH whatever, roll a WD bot it to 70, bot some chest runs for mask of jeram/tasker theos and then enjoy your T6 Ghom 55GPH+ depending on more gear/load times. an easy 8m/gold an hour 1,7b exp hour with pool exp. Nothing beats it, unless there is some super duper smart modifier witch doctor attack routine setup for jade class set to run T6 rifts and even then ~5 rifts in your stuck at shard cap basically unless someone has made something to gamble shards with kadala efficiently now I just haven't looked so forgive my ignorance if there is now.