The main line must be done, and the promotion of the main line is all about experience or strengthening gems. When all the achievements are completed, there will be some jewels that cannot be traded and enchanted. Once I finished my grade achievement in Kedella, and I even sent a 24-year-old Della.

L-class rings are much better than apocalypse rings, but they are still good, but they don't send weapons or anything, and they are super rubbish. In short, there is no harm in being the main line.