This is the deck that I used to get my Masters in February 2019. I went for a build that has a consistent power base that can be supplemented by card draw as required.
My latest win-loss ratio is 14-6. My losses included two power screws and one game where I immediately top-decked my first two Firebomb cards from Cauldron Cookbook.
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.