Mixing flash and LED is possible but would require very strong LED lighting to compensate or lower your shutter speed to let more LED ambient.....etc.
My preferred pic is number three. There is a strong dynamism in the picture with both dancer and powder shooting upwards.
What really makes the shot for me is the stretch of her neck and her face in focus.
If you look at the hands, it is the only shot where there is synergy between the powder and the hands.
I have reservations on the other pictures as the body figure mainly crotch - hips - inside thighs - bum and belly are hindering the shots.
Now for the negatives. the green does not work and is overwhelming. I would like to see more ground under her feet to help the jump.
Removing the copyright signature and adding more ground is a 5 secs job.
The green cast to be neutralized, enhance the skyline and this is a quick and dirty as to what your Jpeg resolution allows. You can do wonders with the original RAW file.
Unfortunately, I cannot spend more time on it and fine tune a low res Jpeg, but this should give you a road map as to what can be achieved with this image.
