Majordomo has a major surprise waiting for you. His hand is literally filled with 8/8 Molten Giants. If you get him below 20 HP he will flood the board with those guys. Unless you are a Paladin and have a Equality plus Consecration combo, good luck dealing with that.
What you want to do is hold Majordomo just above 20 health until you've got the board control to burst him down. This situation almost seemed tailor made for a Shaman Bloodlust deck.
One interesting observation if made is that the AI didn't seem to think Vitality Totem was much of a threat and several times went after other minions. This let me recover and swing the match to a win.
Forked Lightning x2
Whirling Zip-o-matic x2
Piloted Shreader x2
Silver Hand Knight x2
Fire Elemental x2
Lord of the Arena
I've got the board, time to unleash my Bloodlust.
Majordomo is taken care of, now to deal with Ragnaros