Just like the guy in your previous post said, you aren't going so6p rank very easily with the ninjas you have. Just keep on doing arena until you are losing in a row and when you noticed the same guy(s) that are beating you several times and come back at a different time.

Also, avoid doing ranked in the first two weeks since you are likely not going to match against with favorable lineups. Continue doing so until you get more reliable teams like Earth main+Kushina BT+Edo Roshi BT+ Killer bee seven swords style like mentioned.