FM: Only an FM master can give himself an FM ring. It means that your 1 league ring will always have two more 12 damage than other classes. (Usually you can help people with FM, equipment, etc. Make money)

Tailoring, tanning, forging: some equipment and some drawings are picked up to help. It means that your advantage is that you can make something for yourself, and others can't make it for you. (But the drawings that can be traded well are sky-high. ) Of course, tailors can also make bags and wash cloth. And tanning can make whips or something.

Alchemy: according to your route after graduation. Make medicine or medicine or transformation, etc., you can make explosive medicine. It means: 1 material, if you are a sperm transplant. Then with luck, more drugs can be released. Moreover, the jewelry made by the healer himself is recognized as the best cost-effective at present. (Can't trade)

Engineering: You can make things, hats and gadgets for yourself. It is said that engineering is the major that promotes PK most.

Jewelry processing: you can make rings, necklaces and so on for yourself. It's similar to the tailor just mentioned. (Now cut 1 gem, we charge 10G by hand, and you won't spend any money yourself. )

Face-lifting, herb-picking and mining: just to make money, it seems that I can't help you. But really rich!