How can I beat Grand Widow Faerlina on heroic?

I beat her with a normal zoolock deck on my first try. Just drop your hand as fast as possible, never keep more than one card at the end of your turn if you can help it and try to kill her board every turn. Only Life Tap when you are out of cards.

In any case be sure to have 2 Shieldbearers, 2 Voiswalkers, and 2 Defender of Argus, to stop her from killing your more important minions with her face.

Also she seems very reluctant to use her hero power if you have a Nerubian Egg on the board.

The list I used is this one: http://www.hearthpwn.com/decks/76029-reynads-naxx-zoo-deck replacing the Elven Archers with Shieldbearers.