Hi there! Here's what i'm using every NineTails and Group's Capture Summon, Just to give you an idea on how to build and improve your team, this is not the best but it works fine ...

Move1(Barrier Ninja) : Hashirama's passive skill "Ninja God" gives 30% Ninjutsu to all ninjas in your team for 5 rounds and his Mystery skill "Deep Forest Emergence" gives 40% Atk and Nin to all konoha ninjas in your field .. [= +40% Atk and +70% Nin]

Move2(Main Character) : Lightning Main's Mystery Skill "Lightning Armor" gives 3 standard attacks and 15% Critical Hit Rate for 1 round, Standard Attack "Beam of Light" cuz this produces more critical, 2nd Passive Skill "Lightning Style Enhancement" gives 40% Nin and Atk for 5 rounds, and 3rd Passive Skill "Bloodthirsty Demon" gives 2 additional attacks .. [= +40% Nin and Atk and +15% Critical Hit Rate]

Move3(Offensive Ninja+With Buffs) : Guy's Passive Skill "This is Youth" gives 30% Atk for 3 rounds and also gives 15% HP Leech for the whole team .. [= +30% Atk]

Move4(Offensive Ninja+With Buffs) : Iruka's Passive Skill "Teaching Instructions" gives shield and 30% Atk and Nin .. [= +30% Atk and Nin]

You c*so use ninjas that attacks twice each round like Lee[Eight Inner Gates], Zabuza[Mist Swordsmen], Chojuro, Suigetsu, Mifune, Darui if his barrier is in effect ..

I'm using Guy and Iruka since they give buffs and they are also konoha ninjas and can benefit from Hashirama's Barrier..

I hope i helped you having an idea for building your team :D goodluck :D

My skills? Lightning Armor for Mystery Skill, and Beam of Light for the Standard Attack .. Then you can choose any Chase Skill since chases is not gonna happen with 9tails .. Then for the 3rd and 4th Passives, Lightning Enhancement Skill and Bloodthirsty Demon .. Then use Tonton for summon, he's much better than the Green Lizard ..