Mulligans
General Mulligans
Ramp is the key to a deck like this. Generally, if you can get to 10 mana really fast, you'll have a pretty good shot at winning.
Combo is basically get Deathwing, Dragonlord + Malygos + Faceless Manipulator + Naturalize in your hand, then use Deathwing, Dragonlord to pull your Malygos from your hand, while leaving yourself enough mana to cast the requisite number of spells to kill your opponent.