how does the 'party' bit work? can you have lots of people in a party and play multiple games between them at the same time, or does a party restrict numbers to a single game?
All the people in the RL party need to be involved in the game. You could get 8 in a PSN Party and then have 2 separate RL parties playing 2v2 at the same time. Would add to the general chaos of proceedings.
We're not choosing teams are we; presuming we're having a draw? If so, I hope I get someone who can defend.
you should just set a time, see who turns up, then pick suitable mode and random teams from the pool, and have a little round robin tournament. picking teams before hand surely just decreases the chances of getting enough people together at the same time.