Try_hard
Hmm i don't really see Gojo as a harem guy maybe give him 1 partner? And Negi maybe 2-5? And for Vandelieu maybe just his original harem? And Ryu has harem too. You have to write their harem and the other ml interacting among themselves, their friends, their partner(s), their own lives on their original world and on the mission congrats if you successfully pulled that off.