Hearthpwn

Well, hopefuly this deck will help you guys out. It gives me 75% win ratio against any class (played for about 100ish games which isn't really taht much) at least in Play mode. Haven' really tried ranked as I only play to get to rank 20 and have a card back.

Tactics- For early game against 1 health weenies use Unstable ghoul or if not possible use Arcane missiles. As you are getting further into a game play Deadlord and as removal use Frost bolts. Also keep your secrets till mid game as you are going to need them in order to get Duplicates of your Sludge Belchers or practicaly anything of value for you at that point. I prefer using Duplicate+Sunwalker combo to mess with enemy. Also Duplicate can be used in combination with Kirin' Tor Mage to get two extra "free" secrets. For lategame control and removal you got flamestrike and blizzard along with fireballs but you may have to use those in midgame to get rid of 5-6 health taunts (Fen creeper and other 5-6 cost minions) Use polymorh only for tough minions such as Doomguards, Savannah Highmane etc. For endgame ther is not that many options but you can use counterspells agains Priests Mind Control and if you have some minions on board and there is no big juicy target go for opponents face with Pyroblast and minion attacks.

This deck seems to be quite versatile and if some of the cards were a bit cheaper it may do quite well in ranked mode.

Good luck fellow mages :)