Neat lighting! FP4 is not usually so contrasty as this? Did you bump the contrast afterwards?

I love your ideas here. I am a big fan of abstract portaiture like this (you may have seen my failed attempt at it recently ) I prefer the second and third to the first. The first I feel would be a better picture if the neck were cropped out. Almost feeling like 2 pictures there to me. The second I would do the opposite, cropping out more of the face to draw attention to the neck.

The third is my favorite. I love the lighting, the composition, the whole idea of it. However, there is something going on with the toning that is bugging me. I see a hot spot on her cheek, but her eyes are under a different quality of light. The rest of her body seems lit by a different quality of light yet again. If you could somehow balance these light sources so they all appear to be of the same quality - or brightness - I think it would add oodles to this picture. Of the three I see, the light on here face is most fitting to the picture, imo. One other thing I might consider is cropping off that piece of light in the right of the frame, though I can see others arguing its value.

Overall, well done!