
Originally Posted by
Lied
Out of the 3 gachas currently out, probably the normal premium gacha, since the premiums have a much higher rate of 4-stars than the free one and the new character priority premium gacha would favor the new 4-star instead of the one you want. I've rolled 2 St. Paulias from the free gacha, but that's over a much longer period of time. The chances of you getting a particular 4-star you want (other than the new 4-star from the priority gacha) are pretty low though.
You could also save your seeds and wait until they release other priority gachas that might favor her.