So, I was analyzing the job's skills, and while some of them look purely martial, as Cascade, R. Cascade, Fountain, etc, there are others that appear to be more aetherical in nature, such as Curing Waltz, or even the effects achieved by the dance Steps.

But then, I've rolled through the DNC job quests in their fullest, and they didn't (or I missed?) give any actual explanation on how these, more eldritch, abilities work. For one, we can see in the first quests, in the combat sequences, Ranna using some crazy fiery explosion effects on her dancing displays - not something available as a PC skill.

Or perhaps we'll have to wait for another edition of the Lorebook?