My DKT is engineering alchemy. Gold refining SP is very useful and valuable. It is durable and skilled. At present, no other SP is proficient except mop SP. The project has an engineering head, so you can choose your own green attributes, and the nitroglycerin propeller PVP is also very easy to use. Forging is useful as a belt. I regret buying a dress now, because I can exchange it for T 1 1. Compared with DKT, the SP of jewelry is not as good as that of alchemy. The SP of jewelry is blue and the SP of alchemy is purple. Making gold and drinking mixture is also very profitable. Others are only 1 hour. If you can persist for 2 hours, it is equivalent to saving half the money.