In this final version, charging/leaping demons were included to give the knights a reason to be fighting. I went with bloody/oily looking demons, frankly because they look unnatural. I blurred out the background because I felt it was too distracting. I then increased some of the shadowing, such as on the foremost knight's face, the weapons, and their armor/shield.
I am pleased with how it turned out.
Thanks for looking!