Mulligans
General Mulligans
Ramp agains Control Decks and the rest agains aggro is pretty much all the mulligans you have to worry about.
Finley for either Druid, Warlock or Mage Hero Power
A Druid deck built around the tempo provided by playing 0 Mana Minions while also using Splintergraft for the Turn 10 two 8/8s + one 10/10.