play arena with fun teams oh never mind you will get rekt 7/10 by 6 paths.. hmm maybe play Naruto X boruto its fun good luck

True, Arena is a great way to obtain Moon Scrolls, I'll give it a try.

Run fun teams in training grounds as it doesn't really matter what team you run as getting the keys is the important part. Breakthrough some of the base ninjas and find ways to make them strong

Run cancer teams. I have a notorious reputation on my server, because I beat a lot of people who are waaaay stronger than me in terms of power. Those teams are definitely slower in comparison to those one shot hiruzen teams and so on, but yeah...you will beat a lot of people, if you find a team that you like and others hate playing against :D