Thanks for the plugin, I've been using it since hosting Rust and it's very helpful.

I would like to know which settings can be recommended.
In other words, is there any rule of thumb about which ping player influences the performance?
Or do you set a value based on feeling?

I'm not quite sure what you are looking for, but in most games, over 100-150 is considered too high. I've not had personal experience with Rust though, but local players shouldn't be that high.