Any of those would work. Pretty much anything would work in moderation. The only thing that wouldn't work is a laser, because it's oriented only...
Pretty sure they're adding community maps. There was a request for forged 2v2s not that long ago. Goes with the doubles playlist, I would think.
Grid, and nothing comes close. Just keep rotating it and kill the people off spawn. :P You never said top three MULTIPLAYER weapons.. :P
Talk to me on Live sometime, then. I'd be more than willing to chat.