In short, remove or reduce RNG variation bc the RNG sucks. After upgrading it with Bolaya a bunch I decided to reset the bell, I'm glad it no longer resets method levels (guessing this was a bug before?), but now every time I reset I have the bonuses at 2000+ each except for ONE that sits at slightly above 100.
Also nice would be QoL additions showing your overall level, once for the methods and an upgrade count for bell rings, so you know when the respective bonuses trigger their multipliers next. Haven't thought about other systems but something like this would probably be cool elsewhere too