Hearthpwn

So this is the deck I refined over a couple games. 
Not a particularly hard fight. Warrior may also be a better class, but I'm not sure.

Mulligan: You want owl, shadow word:death or silence, shadow word:pain.

So there's one thing you have to watch out for and it's his 3 mana 5/5 that deals 5 to each player. Don't be afraid to "waste" a silence on these to prevent 5 damage to yourself. Later in the game, silence Lightspawns, they are by far the most valuable targets.

Just silence the staff and remove it from the equation. When you get the staff, it's a 0/5 that does nothing, when he gets it back, it's a 3/8 again. Lame. Silence remove the staff for good once it does.

Shadow word: Pain on the staff is a decent alternative if you can then buff the staff with Velen's Chosen. 

I find that he generally hoards all his small crap minions until the end and early on all he does is play weapons, 5/5s and the spell that draws him cards. This gives you plenty of time to try and set up a big guy or two on the board that will help you control what he plays.

Note that on turn 7 he has Flamestrike, so don't flood the board and make sure to heal your guys above 5 hp.
Also keep in mind that his deck has Fireball and Holy Fire, so heal yourself out of range of those. 

He'll generally waste it on minions anyway. If you just play for the long game, he will eventually run out of cards as most of the cards in his deck are much crappier than yours.