You're also bored when you heal because 95% of the relevant content in this game doesn't even require a healer. For healing to be enjoyable across the board, the entire game would have to be revamped to make support roles feel enjoyable. This means making people more dependent on each other in ways that feel meaningful. This means gutting the current "I do my own thing until it's time for the 2 minute moment to kick in" system and replacing it with one where, say, your Mana actually means something and gets supplied by support jobs. Or your attack speed can be lower and you want it to be, and this can be supplied by support jobs. Or the boss can and should be debuffed and this debuff is supplied regularly by support jobs. And on and on and on.

Since we can't even count on people to press Esuna in a timely manner and the game is actively shaping itself to suit those kinds of players, you can kiss this dream goodbye along with any notions of a complex damage rotation.