I didn't get ampy yet, but saw few life crystals and lots of coins/seeds/3* girls.

Overall this event is damn nice. People spawn enough yellow bosses, that if you refresh your boss list (reload game, upgrade girl, give girl a gift) you can basically use only raid points to farm the event. So you have practically all stamina to do other things - I for example did reissue event from practically a scratch (had like less than 200 items from just 3 medaling the maps of phase one).

With yellow bosses giving you 99 or 109 (80 or 90 level) you can basically clear the whole event just on them, and there will be red ones in phase two that give a lot more.

Heck the spawn your boss thing is actually helpful too. Lets say you want to do reissue, but don't want to spawn non-event raid boss which you would need to maybe spend a raid point to attack, or call support not hitting it flooding boss encounters with useless bosses (half of them escape cause people prioritize event ones). All you need to do is just get 10 things from event maps (so thats 100 stamina) then you wait till you nearly cap your stamina pool, then you spawn the boss and not do anything with him till you burn your stamina on reissue maps (80 stamina phase two is best in terms of drops/stamina btw ). When you done with the burn you just proceed to attack/share/whatever the boss. This way non-event useless bosses wont spawn.

As I am done with the reissue now, I will probably spawn the yellow boss and burn stamina on doing 40 stamina event map - as its best for me exp/stamina, life crystals wise. Will end up with surplus of boss spawning thingies to spawn more red ones on phase two, while still farming nice amounts by poking others yellow bosses.

Also instead of poking with 200 damage 2* non-leveled single girl, I poke using a single squad of best girls that does between 150k to 200k dmg on 80/90 level bosses depending on luck. Seems a better idea cause I don't see bosses be alive enough to let enough people poke them for using so low dmg. Actually what I see is that there is enough bosses (including non yellow ones) that some event bosses run away... So yeah 150k-200k it is for me.