Mulligans
General Mulligans
In general you are just trying to survive until you get your combo, jepetto into alex and maly then burn with rapid fire and arcane shot is the best scenario
Aggro Mulligans
Against agro you just wanna kill his minions and survive, your combo doesnt matter much. you can keep zuljin if you have other removal already in mulligan, often times playing zuljin after making them play all their cards can lead to a concede
Use spells for removal until you get Jepetto Joybuzz. Jepetto should draw you 2 minions, Malygos, Alexstrasza, or Valeera and make them 1 mana 1/1’s, if you havent already drawn them. Use these 2 minions two burn your opponents health down and kill him with you spell damage spells. If you draw your combo minions early, make sure you still play them with your spells. If your facing agro focus on killing all your opponents minions with removal before your combo, they will most likely concede when they run out of cards.