Not too bad for your first pass at it. Are you starting to see why I love shooting dancers? Here are some questions/comments for you:
1. When you said 'static light' did you mean that you used a strobe, or what is static stage lighting?
2. The reason I'm asking is that when using a strobe, there is typically no reason to shoot high ISO (unless you specifically wanted the grainy effect). Just turn up the power and adjust your shutter speed as necessary.
3. Did you use any light modifiers on the strobe? (if it was a strobe) I find that a shoot-through umbrella is good for lighting groups. But, it's still hard to control the shadows from one person to the other with just a single strobe.
But, keep at it. The next ones will be better. Enjoy the steep learning curve while you're there.