Wow! What a shot!! Although the rainbow is nice and probably your main focus, it detracts from the overall pleasantness of the phot. Not sure what you can do in "advanced edit" to tone down the rainbow and the mist a bit, but this could have been a great photo! (8)
I like the patterns created by the tree lines on the right and the dark shadows on the left slope. Not sure I would say they define the shot or add a real sense of rhythm, but overall it's a nice scene.
That is one inaccessible looking place! There is a real sense of rhythm, and I find the scenery fascinating. On a subjective level, I wish the rainbow wasn't there.