You are asking for the best way to improve your ability to spam through fast maps without no-fail; that's a silly question really. "playing at aim or reading cap" barely makes sense. You just need to play fast maps.
Celestielle wrote:You said nothing useful anyways
I'm not obligated to answer your exact question without looking at the context. I've been trying to tell you that spamming fast maps is a bad idea, and if you want to be a good player that's not what you should do. But apparently you don't want to become a good player, or you have your own definition of one. So it's pointless for me to try and give you any more advice.