I was thinking about motion tracking as well. When some people use motion tracking for computer animation. they’ll sometimes put an actor in an all black body suit with white/refleftive dots to give the program something to track.
It seems you want your dancers to have the lights over them.. and still still see them. would it be possible to use small white/yellow sticker(circles) and then use AE to A) track them and b) cover the spots with light.
just my 2 bits.