I stopped at 2 (got Chojuro and Mei RNG God), but I don't think we will see the next treasure for a few months (not entirely sure could come out even sooner or much later no one knows). If I was unhappy with my pull personally I would keep going especially for a good barrier ninja. Onoki isn't bad, but imo he is the worst passive barrier ninja. If you get Gaara and have Sage Naruto and Jigo you can run that team with wind main and dance of impetus. How many scrolls do you think you get in a month without events? You can include monthly event.

Mine have been:
Killer Bee, Mifune, Darui (twice), Danzo, Onoki (twice), and Chojuro (twice).

Over 500 scrolls and no mei or gaara. A friend of mine pulled for two rares and got Kage Gaara and Mei. The question is if you think it is worth the gamble.

I got Mei at 660 seals so I was a bit unlucky, but I don't use her.

i already spend near 400 seal and got mifune onoki darui danzo chojuro and i'll keep spend more seal until i get sasuke or ay. i need mei but dont know i can get her or not...

onoki, chojuro, killer b, mifune, danzo, danzo, mifune, killer b so far i spent around 500 seal scrolls.
it is totally up to ur luck tbh

Prob 40 or above, without buying, thx for advice.

Hmm so I got Mei as my first rare so I was lucky. After her I got killer bee, gaara, chojuro then Danzo in that order.