The issue with healers is that they have a damage spell.
Combine of the damage spell and their healing potency gained from Feast balancing, it creates a lot issue for Frontline and Astragalos.
Systematically we cant restrict the number of healers, but S/E really need to looking into the removal of damage spell (or lower the potency to a degree) so they cant overpower DPS jobs on Frontline and Astragalos