The ShiftstonedEternal Power Calculator is a deck-building tool that visualizes your odds of drawing enough Influence and Power based specifically on the cards found in your deck.
You should be holding up units until you can unit + spell in the same turn, with the possible exception of Hojan and the vanilla 4/4 guy, b/c it's easy to strand spells that have to target your own dudes.
Just means playing off-curve - plus I didn't even count the merchants and Valk Enforcers, which are fine on 3 since they have ETB value. But yeah, it's a slow midrange deck and sometimes it will just lose to straight out aggro. Against everything else it's totally fine to wait and use draw spells or merchants until you can Feast-Caller + Savagery or Aniyah hold up Levitate.