just did the priority 10+1 pull and got Kale, Sarcandra, and (not part of the event thingy but) Iris, then a bunch of 3 stars(sorry no screen shot).

This Event is much more fun than the last Gacha Event so far

It looks like it's manageable to get all the good stuff without any stress even if you are luck isn't that good.

approximiately 1600 stamina to get all rewards without skipping anything, so about 20 runs to E-4 (do not do the Secret Garden that it gives out), and averaging 13-14 runs to every Mystery Party Plaza stage.