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would it be leather making
no..
Enchanting is good for some, horrible for others. I suggest you read the thread here about DIS-enchanting for profit, and level enchanting with tailoring.
If that seems to complicated, or theres too much competition in the enchanting reagants market, mining is good. It doesnt really compliment your skills, but it makes you tons of gold which is nice.
Or herbalism is a good choice. Get guildies to make you potions with the herbs you pick, sell the rest.