In all honesty, none of them are great moneymakers. Each has items that are in demand, but the profit margin over material cost (grinding time or buying from AH) is low.
Leather can be sold to druids and rogues though, so at least you'll have a wider market choosing either tribal or elemental, but the majority of gear crafted under these is useless for you.
If you really want to make money, just sell the raw mats (assuming you're a skinner too) and build up your list of recipes then charge a fee to make things if people supply the mats.