Board Thread:Questions and Answers/@comment-32953746-20170903143154/@comment-32612505-20170904060124

Horus2297 wrote: Ndxtg wrote: Do multi if there is bonus on multi (e.g. 2 Kais per multi summon)

Otherwise, do single all the time; because you can stop when you get the card you want, and not waste the rest of DS on random cards.

Exactly, singles give you more control over your stones, and with some banners you might want to spend only 10 or 20 stones, not 50. For sure. All comes down to how many stones you want to spend. If you're going to spend at least 50, then do a multi-summon.