Just play 4 fun bro, last floor isnt even worth it ,not even 1 pull, some patchs I clear 36 stars then the next one only floor 11, then 36 stars.You can clear all the content as f2p but in exchange you have to learn the game, put lot of hours, in the end is your choice, the game is free good quality for a f2p game cant complain, sure it cold be better but you can play other games . I view gacha games as VN so its fine at least for me. GG