Since your close to level 50, you'll soon be able to get summons but in the low tier division which is the blue set, but at level 53 you can pursue in capturing the shark and chameleon summons for the teams in which I tell you now.
Sasuke,Hinata and Karin
Sasuke,Hinata and Kabuto
Since your lightning main your best move (IMO) is the Chidori Blade Shadow which with the chase Lightning Sword can lead to low float in which Sasuke chases then resulting in repulse followed by Hinata chasing the repulse leading to knockdown in which she chases then leading to Karin or Kabuto to chase causing high float leading to Sasuke to chase and finish with Sasuke 10 hit combo and Karin 10 hit combo.Now depending on the summon you use you can get 10 either way but the Chameleon is better as it attacks 2 people.