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.
Congrats! Plenty of really nice cards in there. (Side note: with only one banner and no strangers, you definitely had a bit of luck to not get power screwed in your games. Generally not advised to go tri-color without more color fixing.)
Just had a similar deck I drafted, with yellow as the main color, and much smaller amounts of both purple and blue. I went 5-3, despite very high card quality. All three losses were due to getting power screwed - not having the color I needed when I needed it. I also only had one banner, and one Amber Acolyte. So yeah, tri-color is very risky if you don't get color fixing.