That sounds extremely annoying lol

The good part is that the one thing that can interrupt healing is ignite, coupled with a crap ton of debuffs.
Use characters that can pile on debuffs. Hinata for acupuncture, tobi for ignite, kank for poison, kakashi for ignite and paralysis, etc, etc. You can have a kurenai on your team to reflect things back towards them. And you're an earth main, so use that neurotoxin and poison tai talent.

You want to burst kill his healers one by one. Kill kurenai first, since her Genjutsu: Mirror Return is super annoying and she can apply shields. Then, kill Kabuto, since his clones are gonna be a problem. Lastly, go for Tsunade, making sure to ignite her whenever she's about to use her mystery to interfere with healing.

The problem with teams like that is that they won't have any damage output, so if you can cobble together a team that has high damage and can heal itself, you can easily beat him... even if you have to go to round 10 and outlast him.

But seriously, that team is seriously just a d*ck move lol

You have to ignore the fact that they're doing heals. Look at it as if they're removing debuffs.

Kurenai's heals are sporatic, because they're tied to her mystery. If that person is ignited when she applies it, they won't heal.

Tsunade and Kabuto will heal 2 people each and will remove 2 debuffs. Because of the earth's main's mystery, this will increase to 4 debuffs removed. Remember that Ignite (the thing stopping people from healing) is the LAST debuff removed, so if you have a bunch of them stacked up, they won't be able to heal that character. Also, do as much damage in the rounds that you can, so the Earth Main can't use his mystery.