Any chance this might be lowered from 4M to 2/3M? Or, at the very least, based on how many GLs you have?
I am sitting at 3M GP. I do however, have SLKR, full R7 CLS team, and JKL, as well as nearly at JML *and* SEE. Finishing the grind for those two GLs would not put me at 4M.
So I'm curious as to whether or not an entry requirement based on GLs (rather than roster 'quantity') makes sense.
Note: I could burn resources to level up unused characters to G8, Level 85 in order to make the 4M GP requirement, but I would not actually USE any of those characters in the battle, so it does not make much sense to do this.