What to do next?

I’ve found what yoyos I want, I know what strings and response pads I like. I don’t care about bearings other than they need to be centering of some type. What else should I optimize in my collection? What should I look towards next?

I think you should look towards optimising your skills.

Hardware only goes so far and to focus on it too much can cloud the reason you have to yoyo in the first place; the fun and skill of it.