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.
Your green and red are pretty weak, overall. Your yellow is quite strong. Initiate of the Sands, Living Example, Subterranean Sentry, Wurmstone are all really good cards. Your blue is also not bad, especially with Changeestik; Stormcrasher is a good flyer, and the merchant is also pretty ok. But then again, you have a purple legendary, and also some pretty strong purple cards. So, if it was me, I'd probably go with xenan of some kind, probably with a very limited splash of another color (maybe red due to the pickaxe). Not sure if that's helpful or not.