Would probably benefit from ghost being raised and moved to left into the darker area to make the perspective look more realistic. The picture could then be recropped.
If you modify the lady layer to a green adjustment layer before making it monochrome the effect will be better and you will not notice the light sources are in different directions quite so much.
Changing it to monochrome would also mean that you would not notice the vastly different light levels.
Hope they give you something to think about and play with.