Use Kimimaro Guy MB and Sakura with shark summon. The whole team leaches and put kimi up front as he recovers huge amount of health during his mystery. Saw this in a guide quite a while ago so don't remember now but the formation is:

*x
Sakura-MB-Kimimaro
x Guy x

I used this team for survival trial and I NEVER died NEVER. Completed full ST everyday with this one team. A useful tip is to put Guy in move one (above kimi) if there's too much trouble in ST.

the talents are: Lightning armor, Lightning assassination sword, Lai Giri Decapitation, Anbu special assault tactics, & Bloodthisty demon.
Round1 : midnight blade mystery (DO NOT USE THIS IN ROUND 1 IF OPPONENT HAS HINATA WITH ROUND1 MYSTERY GOING ON)
Round 2 : Guy mystery(if on move 1 go for interrupt and if you have midnight blade mystery saved use that too)
Round 3: Kimi mystery. He will recover a lot of HP.
Use Sakura mystery as required.
All your ninjas will leech like crazy.
HAVE FUN!!!