I am Midnight Blade by my second favourite main is Azure Fang so sometimes i go on fox with this team.Ninja boosting U with ur element power is basic for me (later U can draw some rare ninja that boosting depending on other ninja characteristics like group or village that he belongs to) ,so Haku is good choice beside his barrier he also hitting hard ,even if he can't kill but this doesnt matter here, next Suigetsu his standard attack is using water element and he hit twice as a swordsman even if his mystery have longer cooldown his attacks make enough dmg, last one is Kisame he and main are bombing fox with Shark Bomb mystery every turn (thx to only 2 rounds cooldown for this awesome attack) and he is stealing chakra by bomb and by every attack so U always have enough energy to hit. More stars they have ,more U get dmg on fox I have them all now on 4* but working on 1more star for that team , I hope it help U .