Some people say the wishing is a bit unfair, but it isn't, a 10 pull is really hard to get considering primogems are kind of rare, 1600 is ez if your a whale. Therefore making a 10 pull a 4 star. I really like the Mercy system also, when you didn't get any 5 star content, you get a 5 star on your 90th pull. Depends if your doing single pulls.