Whatever happened to this? I was looking into using this plugin so I wouldn't need seperate Friends, Automatic Authorization and Friendly Fire plugins but I think RustIO: Clans is gone?

It was not migrated to the site as Rust:IO is not available here as well.

So is it no longer supported? Or is the new clans plugin better? But im not sure if it also does FF

It may be supported, just not here on our site.

Where can you download RustIO Clans or is this file compatible with RustIO Clans?

Sorry, I do not have an answer for that.