I've seen a healer team with the water main, Sakura, Kabuto, and Karin in arena. Kabuto's dead souls flooded the line up and they were able to recover more then the damage I'd inflict. Basically it's a good troll/survival team to stall an opponent if they don't have access to any heavy hitters or ninja that can spam poison. Other then that can't get much better. But I'm sure someone will be willing to prove me wrong. :P