When I started I just want 5 star but now I realized that I am doing the wrong thing.
I might not used the other 5 star but I should unlocked the constellation they called for 4 star character where there drop point is 50% guarantee for every 10 pulls. Imagine you have a fischl C6 her damage output will be so high!!! Like you having a lite version for 5 star.
Now I am grinding 90 primogems and I will focused only in one banner (Venti Banner). It is like building only for the desired team that what I am doing now. Some new player didn't like getting the same character but !!! If you read carefully about their constellation and you manage to get all of it !! I tell you !! That will help you a lot for boss battle so don't be upset for getting the same character they are gaining superiority. !!!
Stay tune !! For more!!