I am still working on the mining component for this guide. I will publish some of my findings on this blog but the complete figures are probably best put in a separate document.
Rather than just publish a list of what zones are best for each type of ore I have expanded my research to eventually cover all the zones with accurate data for all. I think this can be useful for those who have to farm at busy times where a less productive zone can be more productive due to less competition.
To this end I have run Darkshore 14 times so far, for a grand total of almost seven hours on a level 42-44 Druid with a 60% mount and the bountiful bags bonus. If you eliminate the bountiful bags bonus (+15%) I have collected 82 stacks of copper ore or about 242 copper ore per hour. Just check what the current selling price is on your realm to see the gold per hour and this is what you should expect for a level 20 character.
I have also made a start on the best Tin and Iron zones. Unfortunately I have limited time for this research at the moment so it is slow progress. The figures for copper are starting to look quite consistent though and it is becoming clear that there are different 'best' routes for the different factions. These are based around making good use of the flightmasters in each zone.
In Darkshore for example, I have a route that starts at Grove of the Ancients and finishes at Lor'Danel, Such an approach allows some zones to be broken into shorter routes that can be tailored to the time available.
I should be able to put up a post on copper ore for the Alliance soon and I will be covering selling the ore as well. The only problem I can see is that copper and tin should be covered together because they combine to make bronze. This combination can unlock a lot more profit from mining than just copper alone.
I have started a couple of Horde gatherers on another realm to cover that faction, and as a side project made a druid and a paladin to see which is best. I will start on these once they reach level 20.