I know I'm repeating the player below, but yes, this really reminded me of Final Fantasy boss fights, and I enjoyed it.
One thing I'd add: an easier first boss with less HP, or a short series of simple bosses as a tutorial, so new players can learn the roles before the real fights.
Otherwise it's fun and well done. Fans of the genre will love it!
I'm in the jam too with Second Tail, a 2D platformer about two rats in a cold city: https://para1992.itch.io/second-tail