Here's my arena deck. Only card you can't see in the picture is 2x wild growth
Champions of the deck are Windfury Harpy (I save those until end game when my opponent has nothing left), Swipe (If I have an Azure Drake in play I can wipe the board pretty easily in the late game), Big Game Hunter and Druids of the Claw.
I'm a little disappointed with my curve overall and the fact that I had 2 Wild Growths in hand. Given my curve, I'd have rather taken one innervate instead. Also, I don't really have a real finisher... my 7 drop is a 5/5 that draws 2 cards most of the time. I usually have to end the game with one windfury harpy in play and some random 4 drop.