Actually, I don't need to find a strategy. I'll introduce you to a method, open your professional skills, find a red pattern, see which one saves money and then prepare 5 materials.
If time is not urgent, you can call the city for acceptance or bid. If you are in a hurry, the auction house will bid at a reasonable price.
Always make the red skills yellow, then prepare five materials, whether it is yellow or not, don't do it, keep looking for the red skills and choose the cheap ones, which I call the five-part rule.
Of course, this will definitely cost a little more than NGA or the raiders written, but it is almost less. If you stare at the raiders, it is easy to waste materials or overspend funds. Using five copies of conventional materials is not a waste at all, but also saves time.
Pay special attention to the fact that the rules of 290-300 350-375 and the last 10 point at the top are not applicable, and more materials of 1-5 can be prepared appropriately.