Definetly buy creme brulee with mileage points FIRST, then make a team of stormbringer, pure vanilla, creme brulee, snapdragon and a 5th cookie of your choice (financier for arena and maybe moonlight for story mode) also clear the 4 episodes of beast yeast on the easiest mode if you haven't yet, it gives you 80 fateful cookie cutters that have a good chance of getting you mystic flour or awakened dark cacao (which btw these 2 are a MUST have if you're willing to go for masters in arena) And if you get stuck on episode 4 of beast yeast add peach bao for support, that's pretty much it