It's much easier to work with the dancers when you have some dance experience as well. You know where you should put your attention, what details are going to be crucial for them, you speak the same language. I guess that's why my photoshoots with dancers are usually quick and results are quite nice ;-)
In this photo -> Aneta, dancer from Polish National Ballet
Technical details:
Canon 6D + 135/2
ISO250, f/2, 1/160s
Natural light only