I used this deck to defeat Omokk on Heroic difficulty. The key to this fight is flooding the board. Cards like Haunted Creeper and Imp-losion are great at doing this. As a typical zoo warlock deck, use your hero power often to keep flooding the board to minimize the effectiveness of Omokk's hero power. I put two copies of Power Overwhelming for efficient trading with his big ogre drops. You need some big drops of your own to beat through his armor and finish him off, Dr. Boom was able to stick on my board and his bombs synergize well with flooding the board and have a great deathrattle if they happen to get picked off by ME SMASH. Hope this deck helps!