Mulligans
General Mulligans
You really need these to make the deck work and maintain board control.
The progression here is fairly obvious. The goal is to keep drawing your spells, and casting them so that your Flamewaker and Demented Frostcaller take care of whatever minions are left. Board control is supposed to be primarily maintained using them while you have a high-attack Mana Wyrm hit your enemy hero.