I do ghom t6 in 20-25 seconds with my lighting wizard any class can be OP if you have OP items.. Wizard is one of the hardest classes though because it requires the largest amount of 1,5-3% items.. Especially if you do not want to go mainstream (FIRE).. I'd recommend DH while he needs tons of good items as well he does not need that many of the super rare ones.. and he can spam out of combat movement skills making him ideal to blitz bounties.. and he can kill ghom pretty freaking quickly too