Now 80 recommends jewelry. The special stones of three jewelers will greatly improve your performance. It looks like 34 min, while the ordinary purple stone is only 20 min, which means 42 points more than others. If you choose three endurance stones, the jeweler's is 5 1, the average person is 30 resistant, and the three ones are 2 1 * 3 =.
If you have patience, you can do it.
Mining+jewelry (engineering) mining and saving at the same time
After the jewelry (item) is 450, the ore is washed, and then the item (jewelry) is learned and washed with the saved ore. If it is not enough, ah, buy some.