Tower is currently the hardest content on DMM, there is no such thing as ez way with it.

It has 15 floors, each floor grant u points based on the amount of quest of that respective floor u can complete and also the number of turn u used to clear said floor. U can set up different team for each floor but once a team is set, all the KH in that team is locked in that floor for 3 days ( u get 2 clear attempt each day ). A lot of quest require u to clear the floor with specific adv ele, so in short u need a wide range of KH from R to SSR of that element as well as heavily invested grid ( Max LB and SL + several 99 according to Bear)

A showcase of Tower floor 15, pay attention to the boss damage as well as her Wrag-tier debuff res
ww.youtube.com/watch?v=i4FE6K9BgyY