First of all, since you just started, stop spending your seal scrolls and save them until you're level 70 so you can pull from the kage treasure so you can pull kazekage gaara and killer bee. By pulling from kage treasure, you'll get common ninjas that can't be collect easily unlike ninjas from instances and shops.
In the meanwhile, you can run this lineup.
x x x
Kurenai WM Hinata
Karin x x
Once you get the Pet Summon system at level 50, go piece pet fragments for Tiger or Rhino. I believe you can start looking for other pets on the world map at level 53?
You can get Karin either in Elite Instances and from the one of the shops (I think Group?) This post was last edited by firstname.lastname@example.org at 2017-7-6 12:22