Your attributes will be already implemented within your walls and other objects.
What you will need to cover though is the space behind the cliffs. You will have to do this with mass attrib fill. But make sure before you do this there is no gaps throughout the cliffs otherwise attribs will fill the whole map. Put both yellow and red behind the cliffs where you don't want people walking.
Regarding the cliffs, there are some parts that look too symetrical, like you've used the same cliff peice next to each other which is not how it should be done.
And what Killmaster said, make sure you dont get black edges.