I'd go for a radical crop on this image. Using the same aspect ratio, I would crop everything to the right of the large rock in the foreground. By using the same aspect ratio, this will move the horizon to the upper third. and lose some of the sky at the top which isn't adding a great deal of value to the image. Also the lens has worked well on the foreground rocks and the crop gives them an increased prominence while keeping the mount in the background. Does this help?