Thanks for the cheat sheets.
Managed to max out my event girl with this cheat sheet, and can now focus (again) on that reissue girl.
However those rewards are rather nice so I think I might keep on it for a while longer.
I really like how on DMM you get stamina reduction for new event missions. Instead of 80 stam, running it at 56 is much more manageble for a new player, making it not impossible to get the event girl (plus it give relatively good expy and additional rewards so its a win win scenario).