Apart from the closer, lower range, these mountains don't need much more detail than this:
They really look like distant mountains seen through a lot of atmosphere; your later versions lose that depth feeling.
Also what Ashbad says about their shape.
Beware of that castle you're planning: I'd make it a simple silhouette using the same color (or colors: at most 2!) as the mountain, for the same reason.
Also if your plan is still to create versions with and without the scroll, I'd suggest to study the composition very carefully for it to work nicely on both versions. It would be far easier to create 2 different layouts.
That scroll is going to need more contrast to be pop out in front of the screen.