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.
Call for Aid is definitely an interesting card, and I think there are Temporal lists that can use it very effectively. However, this list isn't trying to ramp past 8-9 power, so Call is a lot less useful. In lists with Brilliant Idea, TGP, and/or Aid of the Hooru I think it's great.