Board Thread:Questions and Answers/@comment-32842375-20170812230202/@comment-30340667-20170813164559

Spending your all your DS on Elder Kais is not advisable, only do one Summon on there and then you could go either way, multi-summons are mostly preferable. There are some banners that you need to look out for such as Dokkan Fest banners with exclusive cards (you'll know if there's one if you click on the scouter on the banner screen and they say "Dokkan Fest Exclusive" in the corner) and also the Rising Dragon Carnival banners which have double the chance of pulling SRs and SSRs.