I am dropping this and thinking of writing a Soul Land fanfic, either one or two.
With MC having powers of Yogiri Takatou and Book of Myriad worlds(Book with Knowledge from the Multiverse, also ability to summon items from other worlds).
Or MC has powers of Yan Sen the protagonist of the Cultivator Against Hero Society series.
If one he helps Dugu Bo, Chen Xin, Bibi Dong...etc, while bashing Tang San, Tang Hao..etc
If Soul land 2 we can go the route helping Huo Yuhao. Taking down Tang San.