Did a search for this and found nothing, also I am not sure how much this will help. Just kind of want to contribute though.
Few things of note are needed here;Once you get to the point where you sent to Netherwing Ledge in disguise you will notice that there are Nethercite Ore nodes everywhere. These nodes require 350 to mine. Now instead of trying to bust out the last 25 points while doing circles in Nagrand or other giant places, just do flights around Netherwing Ledge.
- Epic flying skill (since this leads to point 2)
- Neutral with the Netherwing faction (at least to the point to where you are sent to Netherwing Ledge in disguise)
The reason this works well is because of your disguise. It makes all the peons friendly with you so that no matter how close you are to them while mining, they won't attack you. Just be careful of the Elites roaming about.
Doing this can easily get your mining maxed in a day, while getting enough ore to get you through your dailies, plus get you Netherwing Eggs (which can be mined up from Nethercite) and you'll even come across the occasional Adamantite node too.
I hope this helps someone out there, and if this has been noted before I am sorry for wasting the space here...