I'd suggest you'd get a more epic feel by lowering the camera position, with the camera is looking up into the model's eyes. A longer lens might help, too - it'd distort the head a bit less.
Personally, I don't think this lighting suits such a young face. You need a really craggy face for it to be effective. I'd use a hard version of Rembrandt lighting to bring out wrinkles etc and 'add character'.