The tournament has certain rules on what's okay and not okay fighting-wise, as well as a general layut of how it works, so it gives every player a chance to participate on a fair level but still give enough freedom to be creative. As for a system for posting, two to three posts after you posted last seems fair; unless you're in a match, of course then it's both necessary and common courtesy to wait until your partner has done their post (as well as not butting your way in to someone else's fights/personal storylines without asking.)

Does this answer your question?