I finally beat this exam after months of struggling with LMC. Here is the team I used that a friend suggested. Special thanks to Angel for helping me out with forming the Kushina and Chiriku team and special thanks to *XThor*x on server 40 for helping me fine tune it with Roshi.

Chiriku at 4*
Kushina and Regular Roshi at 3*

What you want to do is use LMC mystery after Han wipes the field of buffs and target Naruto while spamming Kushina and Chiriku's mysteries. In round 2, let Naruto finish his mystery and follow up so that he doesn't cancel Roshi's mystery. Roshi should be barely hanging on at this point but a well-timed mystery and leech will heal him to full.

Once you get rid of Naruto, continue to spam mysteries until the rest of the fight is done.