What is the best and most balanced effort to code with Fable 5 on the $100 plan?

I'm building a personal project that should not be too hard for Fable to do (personal productivity app, electron. custom to me) and I upgraded from the $20 plan to the $100. I but that puppy on ultracode and it burned all my 5hr tokens in maye a couple of prompts 10 mins in. I tried effort High too but I still think it goes very very quickly, and it needs a lot of supervision. Am I better of with Opus 5 on ultracode? what the sweet spot?