Breakfast Topic: What is WoW's most lucrative profession?

I've asked a version of this question previously in a Breakfast Topic when I was curious about which class had the easiest time making gold. There didn't seem to be much of a consensus in the comments, which is a good thing. No one class seemed to have an overwhelming advantage when it came to piling up a boatload of gold. But since Cataclysm launched, it's a question I've occasionally pondered whenever I hear someone grouse about the expense of gemming a tier set or enchanting a new weapon. One of the players in question was a max-level jewelcrafter, which threw me for a moment.

"Shouldn't you be making money hand over fist on the Auction House?" I asked.

"You can," he said. "But a lot of it just pays back the expense of leveling JC in the first place or recouping the cost of buying ore and gems."

I'm curious. For all those of you out there who have two primary professions or just a host of alts with different trade skills, which one has earned you the most?

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