Hearthpwn

I drafted this on the fly to beat normal and it worked the first try against heroics, so I didn't tweak the list. I would cut cards like heal bot and maybe the bomb lobbers for shadow word death since Garr will drop alot of fire elementals and will combo out a volcanic lumberer, but I didn't need them.

Lil exorcist and mass dispell defuse the timer you have problems with, and cards like crazed alchemist and cobra help you clear more minions when he tries to reflood. Cards like loothoarder and pagle are just to draw into the important cards.

I threw out a naked exorcist to protect my Grim patron in the late game from fire ele and snowballed from there and dealt alot of damage, so SW:D would have been better so I could hold the 2nd exorcist.

Good luck!