How to optimize the cryptocurrency mining process?

Hello. I don’t know who started mining and on what, because there was no one to ask. But I immediately chose the best mining equipment so as not to waste money. For example, antminer s9 profitability https://minery.io/hardware-store/antminer-s9/ fully justifies the costs. With it, in any case, you can start the workflow. But if you want to fully optimize cryptocurrency mining, then it is better to do it with the help of hosting. But everyone decides for himself what is more interesting and profitable for him.