I use fire main sage naruto sage jiraiya and Hanzo, what I do is make myself immune round 1 and tank 1010 mystery then round 2 they always try to bait you with water main mystery (all 1010 mabui users are brain-dead it's almost like playing with a bot) all you have to do is kill mabui and that's it for the team don't even worry about mei as she is always in 4th place which means you second slot jiraiya can destroy her on round 3. don't go for mei if they bait you with water mains mystery just kill mabui to cut their chakra, sure they can heal but the heal uses most of their chakra and mei needs 60 for her mystery so Basically KILL MABUI before you lose your second ninja.

oh yeah I forgot about that but still the point is killing mabui before 1010 does major damage to your team, mei is still dangerous but if you play decent just about anyone can disable her mystery because she is almost always in the 4th slot.