Well done. Have you ever considered painting this scene based solely on the book? You know, sort of clearing your mind of the movie's interpretation, then using only Tolkien's description as your basis? I would love to see where your talent would take you.
It was already an epic win in the books and even more of a win in the movies, my favorite scene from the movies still is the intro of the second where the recap this scene then add the two fighting whilst falling deep into the earth, if you ever get a chance to work with this concept again I think you should try that as a sequel to this amazing picture that would be so awesome