I've played quite a bit of Rust and it's a great game but imo the servers are abit shit on that game that's why I don't really play it anymore, but if Zarp had its own server I would play that shit all day brother!!!
I would prefer the Rust server to not be one of the OP types, at most I would say 2x as I think 5x and onwards servers are real boring after a while but maybe that's because I just enjoy more of a vanilla experience.
I think variables like that are to be decided by the community as a whole. I'd suggest a poll on which multiplier is the best. This is a personal preference so it's only natural we pick whatever the majority enjoys the most.