Summer Event currently on unit July>reroll
Go until chapter 1-1 then grab everything from the missions and the box.
For tierfags you should aim for Daphne Bloom > Lulu = Satan > Iblis = Salucia = KS-VIII > whatever
Recruit filter: https://purindaisuki.github.io/tkfmtools/en/enlist/filter/
(Make sure to have/vmg/ in your profile comment to gain priority)