Before dailies were heavily implemented - I spent quite a bit of my time binge mining, I made quite a bit of money each circuit, generally mining 20-25 stacks of adamantite at a time. I developed this circuit to cover all the key node spawns, above and underground. There are a few ogre caves on the circuit that are optional ( I usually skipped them, dps is low) Also - the Star is by the Twilight Ridge, where there are often rich adamantite deposits and khorium veins.
Two screenies for you
Above is my cartographer for Nagrand, almost every node marked.
And below is my circuit. I start at the circle, which is the little ogre area at the outskirts of Shatt, where there are usually a few nodes. From there I head into nagrand.
I found this to be my optimal circuit, hope you all like this