Improvisation is.... not great.

I've been learning Hades this weekend and can't tell you how many times I saw that one player standing just outside the very obvious radius of the skills in the phase transitions. Honestly I don't see where the skill couldn't be made into something like Mantra where it's just something you can pop and impact a radius around you for additional healing, which would then let it combo better with Curing Waltz, or be a smaller radius than Mantra but goes off around you and your dance parter.

Then leave the animation you have for the down phases to just let you passively build esprit without having to have your full party near you.