Quick Questions 3

The next is most probably gonna be Danmachi. Here's what I plan to do with the power dynamics. If you don't understand these then refer to the Auxiliary chapter named 'Ranking'. What do you guys think?

1. Lv 1,2,3--------------- F-, F, F+

2. Lv 4,5,6--------------- E-, E, E+

3. Lv 7,8,9,10------------ D-, D, D+

4. One-Eyed Black Dragon is around C-

5. The Strongest Gods like Uranus, Zeus, Hestia, and Freya are around C+~B.