You're not getting close enough to the model, for starters.
Is the green crap behind her a gelled strobe, or actual green crap on the rocks? I can't tell, but it looks extremely weird the way you have it lit up. You've separated her from the background at the expense of making the background look rather bizarre (it's obviously lit, but we don't see a light source).
The black tights are not well separated at all, and are almost a uniform black region of jumbled legs. Either have her pose differently, or light them to separate and show us legs.
The light overhead is the only strobe I can really see in the picture (other than the bizarre background) and that's only because it's casting an extremely unattractive shadow under her chin.
On the up side, she's an interesting model and you've got a strong composition here -- the shapes and forms are arranged quite well. I am not in love with her styling, but by god she is styled, and it doesn't matter if I *like* it or not, the point is there's a statement made there.