This is actually a really good idea. The devs are keen to keep the server as identical to real OSRS as possible, but I think an exception could be made with this.
Support!
This is something that is planned for a future update, please feel free to create a suggestion post Here with any specific benefits you may have in mind
Hey Necromancer.
I would recommend you check out the "Clan Recruitment" page Here . There are a few clans that do raids and I'm sure you could get into one of them.
I would also suggest checking out the #looking-for-team room on the Discord under "Chambers Of Xeric".
Good luck!