Great take on the challenge, this is a very creative idea. The crop used really brings the flame to the forefront of the composition. The right arm is a bit deep in the shadows and a bit more light there and on his chest would have add some definition to that area. If you could have used some lighting you also could have increased the F-stop and reduced the ISO and had a sharper image. At F/4 there is a limit on the DOF and I feel that lost of sharpness resulted in the lower votes.
Overall this is a very good imaged and had I voted in this challenge I would have scored it an 8
Very nice idea and guy even look a bit like samurai. I think would be even nicer to see sword in some kind of action but I guess it was not easy to capture this either.
I like the lighting on the face, hands and blade. A touch more definition on the right arm would have been nice. A little more downward angle of the blade to align with the V of the face while giving more vertical space for the diagonal formed to extend from top left to bottom right. Still a fine image.