How would you solve the boring "damage rotation" of the healers?

[CamuiKushi]

I'm not a healer main, but my perception is that healer kits are so powerful but there's not a lot to use them on outside of the highest of high end content. Having a few bosses that hit like Diabolos Hollow or something with super hard hitting autos where the damage can't be cheesed by tank invulns could help with that.
A specific thought for maybe one or two healers is maybe they could have a builder/spender combo where using GCDs will give them access to a big oGCD (think lillies, but the big hit is oGCD).

But again, I'm not a healer main.