I have been shooting dance since my daughters were 3 years old. they are now in their 40's. For the dance teachers and older dancers they want to see the whole dance. Their preference is a fixed camera full stage !! I know it may not be " artistic " but if the point is to show the dancers capabilities or the dance choreography no movement can be missed. Dance is a language. Missing movements is like leaving words out of a sentence. This can of course be facial expressions so need to be close enough to get those too.