Nurse, Blight, and Spirit must be balanced based on Red Rank.
Let's take a nurse as an example.
Nurses have the lowest kills. But the statistics are from 1st to 20th.
Beginners can't even get 1 kill. However, nurses with a red rank get at least 3 kills per sale.
Based on this, it is necessary to adjust the balance, but if the overall stats are set as statistics, it is meaningless to nerf Nurs, Blight, and Spirit.