According to the design of WOW, the profits of all majors are basically the same, but there will be a big gap. For example, in the final version of 4.3, the most profitable is forging (100 point main attribute), and the least profitable is jewelry (5 1 point main attribute). Other majors are 80 points.
For the mage, tailors, enchantments and jewels are all ok, but the profit of jewels was hacked in the last version, and so is this version. . . Among the three majors, the enchantment is cheaper and has high use value, and the tailor takes time and money (doing daily work). If you choose engineering, you'd better choose a second major to save money and worry, otherwise it may be unbearable.
It is recommended to choose engineering+enchantment!