Hearthpwn

The game plan is simple.  Stall the game with Frost Nova,Cone of Cold, Blizzard, and Flamestrike. Novice Engineer and Arcane Intellect will help you draw into them. Don't be afraid to take some damage in the early game, try to hit as many enemy minions at once.

Get a good discount on spells with Emperor Thaurissan, and then generate as many Fireballs as possible via Archmage Antonidas.  Make sure you have an Ice Lance or Frostbolt in hand to freeze Antonidas so he sticks around for an extra turn.

Flamecannon is there to clean up leftover Spectral Knights after using Flamestrike or Faerie Dragon after you've exhausted all your AoE. Mirror Entity should also help you in that regard, just don't play it on turn 3, because you don't want to copy his early game minions.

You should be able to win around the time fatigue kicks in.