Thanks for the advice so far, but I've tried the academy farming thing and it doesn't seem to work.
I partied my level 1 characters and brought them to places like Moonlight Tomb but when I killed enemies they would gain little or 0 experience.
I tried bringing them to Forest of Mist to kill level 11 phinos and they gain very very little experience. Towards the end they are not even gaining any experience at all.
Am I doing something wrong? Do they need to stand very close to the monster before I kill them? What level range do they gain experience at?
Or is it just my main is too high level (64) for them to party together?
Really stuck here and getting frustrated, any help would be appreciated.