I see people in Arena sometimes who run Roshi, AF, Sailor Sakura and Mei as a team, not sure if that's something you'd consider or not.

Also, if you can get Kushina to 3* and get both Kinkaku & Ginkaku, you could put all them in a team together.

Talents for this team would be: Regenerative Healing Jutsu, Healing Jutsu, Chakra Dissection Blade, Neurotoxin and Poison Tai, with the Monkey King for a summon (if you have it).

Here's a few other suggestions (as well as talents, chases and summons) you could consider, based on what you have or what you could get:

Main, Kisame, Gengetsu, Snake Kabuto (Regen Healing, Healing Jutsu, CDB, Healing Tips, Soul Absorption, Rhino)

Main, Kisame, Snake Kabuto, Choza (Regen Healing, Healing Jutsu, CDB, Healing Tips, Soul Absorption, Eight Span Bird)

Main, Sage Naruto. Mei, Snake Kabuto (Regen Healing, Healing Jutsu, CDB, Healing Tips, Poison Tai, Dog of Hell)

You could also probably go for an "immortal" team with Roshi, Main, Sailor and Jigokudo...but that sounds boring af if you ask me. Noticed the suggestion in another thread looking for help with Water teams.