ive been doing fine with:

mei - Ao - x
Water - 1010gnw - x
x-x-x

Suprise them with 1010s 60 chakra mystery on first round if they kill the two Ao clones.

water main: mei tenten gnw mabui or sakura sailor, wind main with empress: mei tenten gnw sasuke playboy or mabui or sakura sailor

Water - Mei - Mabui - tenten gnw :@

I personally use Water, Mei, Ao, and Chojuro, because Water, Mabui, GNW Tenten, and Mei is easily countered by immobilizing Mabui since she is most likely in the front line. They are both good teams I just prefer more control over round 1 burst damage.

Mei Mabui and 1010 will give you the better overall results, and the fights will be less close. When you get countered though, you will get countered HARD.

Mei Ao Chojuro will have you struggle a bit more all around and have closer fights, but grants an extra degree of control, especially against mystery field changers like hashirama.

Both are solid. I personally have more issues with the ao/chojuro teams while the mabui teams are piss-easy to counter, but the mei/mabui/1010 teams do seem to put out noticeably more damage.