Lonly Mountain

Its nice but it doesn't fly remind me off a dwarven hold maybe if you have a gate or an entrance like this, and then have a small outpost in front of it.
entrance to erebor - Google Search:

If I were basing it off of the movies, certainly but I'm not overly fond of it's design, nor does it fit into an RTS very well.

I toyed with designing it like either Thorin's Gate in War of the Ring or the hobbit cartoon from 1977

Looks great!