Last event girl info can be found here:
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Summarize: skill 2x dmg for 2 target
passive: increase solar drop 5% / increase solar dmg 15%
The new event is about making your girl stuck running all around to pick bread.
As for strategy for 80 map, i believe its best to have 1 slow girl on mid left camp, while put al the 4 girl at the top (don't put girl at bottom camp as this will make you clear the map faster)
the slime? / Jelly with hat? bread give 700 point at the end so don't put a girl too slow as you want all 5 girl to hit goal.
For map 40: you want a slow girl at the top camp alone running to boss, while puting 4 really fast group to be stuck in middle running around picking up point, as for point comparison i find the map 40 might net you more, but this require alot of fast girl.
Use those point for gacha... like the past event you roll until you got the rare item, then go to next batch... once you already hit next batch you can't go back so plan well.
PS: roll the 11x premium gacha and no 5*, this is the 3rd time in row -.- I'm starting to hate this game now
nothing much to do end game....