As far as Healers in other MMOs go and i played a lot of mmos i can't really say i played any that really compare to how FF14 does its healing granted i haven't played every MMO with a healing class, and most of mind been 2D mmos.

But i will say this much Mabinogi i only remember the archer of that game. As far as the Healers goes Maple story healers were very OP they were a great DPS and healing. Mind you maple story was a 2d sidecrolling MMO it had whole screen aoes, i wouldn't want FF14 to have any of that. Though if i had to bring in anything from another game is the power to summon a pet to fight by your side the healer in maple story had a pet dragon they could summon X3