Hi, just joined the community, any advice?

I’m looking for an efficient strategy, i’ve been reading some of the post here and learned some things

-all gems go to the vault

-i’ve seen some people that don’t salvage their items?

-and also would like to know if any of you have a preference when it comes to upgrading every station, I usually try to make everything cost even

sorry if I misspelled anything, English is not my first language.