Board Thread:Questions and Answers/@comment-34946484-20180309131222/@comment-32233739-20180309135934

or, you could reroll now, do a couple of summons on Kefla banner to get Caulifla and possible Kefla etc

then save all the stones from quest and anywhere else etc until the next banner

the sooner you start saving stones, the more you will have when the banner comes around and it will take time to farm stones too