Are you using kakashi and Sasuke at the same time? I wouldn't recommend that. Sai, Sakura, kakashi( or I also recommend Sasuke if you don't want kakashi) can do quite a bit of damage . I also think Sasuke and Hinata usually make a pretty good team no matter who they are paired with.

Well, your team could use some extra characters... but to make do, you could go with...
Kakashi - Clone - x
Kabuto - Main - Gaara
x - x - x

2 - x - 3 - 2 - x - Chameleon/Tonton
You can fill x in with whatever you need. Gaara's in the middle to take more attacks and Kakashi's near the back so kabuto can place clones in front of him to act as walls.

I wouldn't recommend using 2 field setters together, so you will want either Sasuke or Gaara only, because their mystery cancels each other out.

Hinata, Sasuke, kakashi - gives a 10 hit combo

Sasuke-kakashi clone- main clone
kakashi-Main-Hinata
x-x-x

on Shark aoe skill, chase: chakra blades, nuerotoxin, clone and Shark summon (Since u will get it soon)

Alternatively replace kakashi with Kiba,

Main-Main clone-x
x-Sasuke-Hinata
Kiba-beast clone-x

on 2 healing skills, chakra blades, clone, nuerotoxin and chameleon summon.

I find that these two builds work well for plot instances and survival trail.

Thank you for your answers everyone,really helped me.