Hearthpwn

I think you should try Big Spell Priest or some type of Secret/Tempo Mage. I think you will have more fun with Big Spell Priest (as secret/tempo mage is pretty powerful but not that interesting in my opinion), and it is very competitive.

Since you have Temporus, you've probably already tried a standard Dragon Priest, but that is also pretty strong. And with Netherspite and Drakonid Operative, you have tons of card draw and even some fun getting your opponent's cards to use.

Or maybe Tempo Rogue. Just played against that and lost horribly, so its still a good deck, not sure how interesting you would find it though.