The tip is to kill them first before they can kill you. So that means don't focus on any healing. You might have to come back to it since the new update made the blue circles significantly harder. WhenI came back to it, I used water main.

It doesn't matter where you put them as long as it's in sequential order because the frogs attack everything. Also useless to use clones as stated before.

Please note that all these ninjas are cultivated to the max and have at least lv 6 mood and are awakened to gold.

In order: Haku 1st, Water Main 2nd, Sai GNW (you should have him from monthly) 3rd, GNW tenten 4th. (she is in most events)

Use Haku's mystery first to buff all water ninja and go on from there. Use skewering, I guess shark bomb works but it does a bit less dmg since it's AoE. Blossom clash or flow whip. 10 combo chase. Enhancement of water style ninja. Water clone. Summon ton ton. (Guys tortoise if u have it). Chameleon dmg is spread so ton ton is a better choice. Also note that they aren't immune state so Sai's immobile mystery can come in handy.

If all else fails try using wind main and super *y harem Jutsu. The froggies are male. But I don't know a good team for wind main.