www.elitefourum.com/t/answered-what-are-the-best-sleeves-to-use-for-pokemon-cards/14994/1
This guide might or might not be helpful^
I think I ultimately decided on just the ultra pro deck protectors and ultra pro premium binders. No double sleeving, and I store extras inside UP premium sleeves & card savers, then inside PSA graded card boxes.