Efficient Ways To Pay To Win

I know that most things are a gamble with maple, but what I'm looking for is a guaranteed payoff. Like, gachapon or marvel runs probably aren't worth it spending 10 dollars, but doing ___ is worth it at that price. Or if you're spending 50, then you should do ____. If I had enough disposable money, things would be easy enough no matter what I do, but I don't.