Here's for those Earth Mains out there. 75-79 you can try this strat. For 75:
Round 1: You want to get your acupuncture on Anyone EXCEPT the Taijutsu dummy. Don't forget Hinata's Defence skill.
Round 2: Use Your Main skill on Hidan if he does not have acupuncture. If you get paralyze and Hianta does not interrupt, retreat. If Hidan has acupuncture, use Main skill on Ninjutsu Dummy to interrupt.
Round 3: By now the 2 Front Dummies should be dead or close to dead. Use Naruto Rasengan on Kakazu if he does not have acupuncture. If both Hidan and Kakazu have acupuncture, Just launch the combo at the highest Health Target.
Round 4+: If you did it right, both Hidan and Kakazu should be acupunctured or on cooldown. Your frontline should still be alive. Your hinata defence skill should be up again. Just kill them all but keep the acupuncture on them at all times.

For 76-79: If your hinata keeps getting hit by Anbu, swap with main or don't use Hinata's Defence skill. If you come across Healers or Yamanakas, Kill them first.