I've beaten this exam at 47500 pow.
Used the following lineup:
x x x
AF Mabui x
x sasuke hinata
talents: 32321, summon (doesn't matter, i had tonton equipped xd).
strategy: let danzo chaos the clone, whoever gets comboed by danzo doesn't matter. use sasuke barrier asap. When mabui gives you chakra and heals hinata use her mystery to endure all the hits from MB and others.
Round 2: use mabui's mystery on danzo to keep him under chaos effect. If mabui is chaosed by Fu retreat and redo (but it shouldn't happen). Heal with regenerative healing jutsu after MB uses his two standard attacks if your hp are low otherwise wait for the following round to do it.
Round 3: use sasuke's mystery on MB to apply chaos on him.
Round 4: use hinata, sasuke barrier again and mabui on danzo to chaos him again. Should be close to be dead if not dead.
Round 5: use sasuke mystery on mb and go on by healing when needed until you win.