Alexstrasza does a lot of work in many heroic fights, but I still don't have her.
I found heroic Omokk to be the hardest fight so far. He drops decent minions as hero power is good as well. I used an aggro paladin to take him out.
General Drakksath was pretty easy. KT works great. Used KT + sunwalkers + force tanks + giants etc to beat him multiple times in a row. Used priest bc shadow word death and light bombs etc are great to regain the board, for taking out legendaries etc.
For rend blackhand first I tried a hunter with traps but I felt the deck wasn't that consistent. Basically need explosive trap in starting hand or it's almost impossible.
Finally I ended up using a divine spirit + inner fire priest to beat him. I think this deck works great on most heroics, but I always try other decks first.
My deck:
2 zombie chows + 1 clockwork gnome + clerics. Turn 1 is essential against rend. Clockwork gnome is used for a spare part essentially to combo later with wild pyro.
Circle n auchenai, holy nova, lightbomb, wild pyro for board clears.
This much removal plus small minions allow enough turns to draw most of the deck.
Lightwells for healing. I never buff these because then they,re ignored by boss and they're basically healing for 6 every turn.
Inner fire + divine spirits,velens chosen, PW:s used on deathlords and stoneskin gargoyles.
I used a similar deck to beat heroic ragnaros while also killing all ten molten giants.
