Okay this is my first contribution. I finally found something I can post =D.
This takes advantage of the bug in Blades Edge Mountains with the Fire Elementals in the Skald.
First, respec to something like this: Talent Calculator - World of Warcraft
Good gear helps, too.
Now go to the Skald. Run around and pull 5-7 Fire Elementals, wait until they're packed into a group, and unleash your fury! Frost nova, back up, BLIZZARD! AE if you need to finish them off or while picking them up.
Just keep doing this. I saw a mage doing this while grinding on these elementals. She was pulling in 7 motes per pull and the pulls took less than a minute.
You can do this in other areas, but the respawn rate and closeness of the mobs really helps =).
I know this is a little common sense, but I never thought of it.
Enjoy,
~Nate