i had a neat idea for a competitive team based challenge
you'd have like 3 teams of 3, trying to complete all the challenges first: anyone else on the server is put into spectator mode and follows the misadventures of the 3 teams through the game, which follows a specific pattern: 5 normal challenges, followed by an elimination challenge which is bigger and ends up removing the team that did the worst, and ends in a big 'finale' where the last team is put up to a defense mini-challenge against all the other players on the server, including the other eliminated teams. and then if they fail, nobody wins and everyone loses!
i think i should actually put this into production at some point. but you guys could try making it now, though