The Glyph industry is by far the biggest money maker I've ever had. I run a sizable chunk of the industry on Blackhand and utilize 2 scribes for my production cycle and 5 sales mules. Why 5 instead of 3? Time taken.

2 scribes means I can mill herbs faster. I'll be scaling up to 4 scribes soon (not 5 because my 5th guy already has two maxed tradeskills I intend to keep for raiding.) This means I can make inks faster and mill herbs faster than any single player can hope to.

5 auction house mules because again, I can post 5x faster, get mail out of the box 5x faster, etc... most people think thats not a big deal, but when you consider I keep 2500~ auctions listed at any given time, and you can only get 50 mail items out of the box / minute... it's the difference between 50 minutes at the mailbox and 10 minutes at the mailbox.

As far as results go, I earn 750G a day (pure profit, thats after expenses for ink, papers, etc are tallied) like clockwork. I spend about 2 hours every 2 days to do this.