Here's a link to my Thief class that branches in Assassin job (kind of like a ninja DPS specced, I guess). I could easily see Dancer becoming a tank or healer out of some of those abilities. It would need to be tweaked of course, but they could do something like a link between dancer and a single target, or stance it out for group and single target, and have that target get healed for 300% of the damage the DNC is doing?

I dunno, I like this theorycrafting for new jobs and classes though!