Manyus would be very nice seeing as the event missions won't spawn SG.

EDIT: Confirmed that they will 'include some goodies' for phase 2, so don't stop farming!

Not sure why that is, but my game stopped spawning bosses. I´ve run the last event map like 4 times in a row and not a single boss spawned.
Very annoying, as it seems other people stopped spawning them as much as before too.
At least I got all the Dress blooms, and 2 skill blooms, so not much more longer to go.