1 Year of Service
(At least for me) between the last two 5 stars on FGO, I got around five 6 stars in Arknights (the equivalent to the 5 stars on FGO).And what about the gatcha?, I doubt will be worse than FGO nightmare but who knows
Also, this is more or less the pity system in Arknights:
And this is more or less the amount of rolls/pulls you get monthly:If we are talking about the 6 stars, it depends:
For limited banners, you'll be able to exchange 300 of that banner currency (1 pull = 1 point) for the limited 6 star on the banner (or 200-300 for past 6* limited operators). But it's also true that on limited banners, there are usually some "free pulls"
For ANY banner (including limited banners), the 6 stars chance start at around 2%, and it increases slowly (I think it was 50% at around 35 pulls, and almost guaranteed at around 67 pulls), and it resets after you get one.
I think it would depend on if you can (borrowing operators probably) beat the 2 "standard" annihilation stages, to increase the weekly limit you get from them from 1200 to 1800.
If you can do it (sometimes one op borrowed character can do almost all the work), it will give around 20-22 pulls monthly I think? If not, around 15-18
(that, if you do those stages weekly, and complete the daily and weekly quests)