So since you're allowed to team in ffa, i think it would be a good idea to add a feature similar to the party feature. It would be something like this: /team invite <name> and it makes it so that you can't hit each other, because it can be really annoying if you're trying to help out your friend by shooting the person the person thats attacking them, and you end up shooting your friend. You could also add commands like /team leave and /tc (team chat)