I just found out by accident ( never pay attention on release notes by Blizzard ).

I just leveled up my warrior as a tank, and maxed mining days ago, just for the 480 stamina bonus and mining seems a money make nowdays. Then i took BS as second profession and thank god, i google before burn all my gold into AH.

Basically, you can power level blacksmith just using Ghost iron ores, to be exact, 8000 of them or 4000 ghost iron bars.

if you super rich,just buy all mats in AH and power level in hours.

Since my guild already at 21, using guild perks, just makes thing easier.

Where to farm ores ?
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1. jade forest 1 loop can easily fill you 16 slot bags, and there is a secret cave that have 5-6 spawns
2. heartland

Just fyi if you don't know..........