I'm kind of surprised there isn't an x360a team devoted to trying to get these achievements out of the way, or rotating people in and out to help them get the achievements done if they're so inclined. A few people in charge and a lot of rotating people could get up in team level and hold territories rather quickly I'd think!
Looking For Elliott's Portrait
in Fable 3!
Message me if you're organizing something in multiplayer for Red Dead Redemption!