I was thinking about having 2 people each, so a 2v2v2v2 for 8 people. that way multiple paths could be defended by DGs as well as creeps. And the flag thing that I think you are talking about was how we'd choose the paths for the creeps. We'd have 3 portals each, but you can only activate 2 of the flags in your base to send creeps out. that makes it so there aren't too many creeps spawning at one time. I think we'd have to stop the enemy from being able to capture the flag unless that citadel had already been destroyed, but maybe it would work without that restriction. Althought it seems that right now, pathing is by team, not portal, because when you capture the side portals in atlantis, they go the direction of the team who's capped them. It might be a problem to have the creeps head 3 different directions for each team.
Also, what happens when one team's stronghold is destroyed? Should that team be kicked out, or should everyone stay in until 3 strongholds have been destroyed? That way, if you are defeated you can still fight back but you still can't be the 'winner.' In this case i think the portals should always be in control of the team that is from that corner.
Just thoughts forming in my head, what do you guys think?