Well, you can easily clearly see the issue with the hair. The head just blends into the shadows and disappears. It just is a killer problem. I am kind of a novice with these kinds of corrections, as I rarely shoot under these conditions. You know the old saw ... use it or lose it. Work with figuring out a minor halo effect, see it it helps a little. I tried using some sharpening techniques, with a really large radius, to get some separation, but it is really difficult without messing up the rest of the image.
Wearing dark colors in this environment says one thing ... "They do not want to be seen." The guy in the last image is nearly invisible.
have you messed with the Exposure wand in LR where you can increase the exposure in certain areas only?
i'll try a few things later to see if i can find a way to separate the heads from the background too!
Some decent shots and a great first effort! The flash definitely helps with the lighting!
If someone doesn't hit ya first..lol
I would have to guess that this kind of shooting is really tough even with all kinds of 'pro' gear and runway access, black on black with soft lights and subjects in motion. tough stuff!