To be honest the best way to get money mining (on my server maybe not on urs) is to go to Burning Steppes and mine thorium. It might sound funny but a stack of thorium ore sells for about 25g on my server while a stack of adamantite sells for about 20g. Not many ppl have been farming thorium so a trip around Steppes yeilds around a stack and a half or better. For outland mining i have found that if ur goin for fel ore obviously hellfire is the best place and if ur goin for adamantite blades edge is really good. But like I said it depends on ur sever so i would check out of all of the ores which is sellin the best and has the lest on the market and go from there.