Patchwerk: Freeze/taunt mage, you want some freeze and some ooze from the start, duplicate is nice on stuff like Deathlord, use Dancing Weapon and for draws use Oracle, since he takes fatigue damage when he has to draw even though he doesn't on his turn.
Grobbulus: Buff priest, with inner fire and shit. I kinda did jackshit for the first few turns then turn 4 deathlord+inner fire for a 8/8 taunt, kinda wrecked him from then on. One shot but had good draws from the start.
Gluth: Mill druid with the 4 pandas and 2 ooze. Pandas are for the ooze, I found the mill thing worked kinda alright but on my kill I didn't actually mill him much since I got first oracle like 18cards in. Mostly using the druid spells to clear shit, healing touch and ancient of lore to recover lost health and do break his weapon everytime. Pretty much have to restart everytime you don't have ooze in hand, and if he replays his weapon right away you can restart too. Want to restart if your ooze die before you bounce it back to your hand too. You need like 3-4ooze to handle all his weapons, rest is relatively easy. Druid of the claw in charge form were instrumental to actually kill him, Naturalize on the mob that destroys shit next to him is also great.
Thaddius: Paladin with a few secrets and 2x Blessed Champion or whatever the thing that doubles damage. Use eggs since they proc right away. Mulligan until you have equality in starting hand and preferably a ghoul(the ones that explode). Turn 2 equality, means you only take 2dmg from the mobs the turn after, turn 3 play the ghoul, when it dies it kills both the big mobs. From then on just try to control, second equality is nice to wipe the board once he does his overcharge shit, double the damage of some shit like nerubian egg mob to hit him hard every other turn.