Ultimate fighter IV - step II.... I feel like I'm in a bout myself!

I had a couple of hours to dedicate to painting today, so I took the opportunity to have another run at my paintng in progress...

I seem to have zeroed in on a viable color scheme. At the initial stage, I felt I was on a free fall without a "chute"... fortunately, I managed with this second pass to get closer to where I want to be. I'm still correcting proportions along the way, looking for ideal lines for this composition... at the same time, I'm thinking about solutions for the dark background and the aggressor's left arm.