New Fanfic Stats Feedback Please…

I'm going to making a new fanfic, I'll still will do update this story but I was wonder if I can get get feedback on this stat board I made.

Stat Rank"

Normal human level: 0 - 5 to 0 - F-

Above human/Huntsman/Huntress level:

F- > F-+ > F-++ > F > F+ > F++ > F+++ (Below Tier)

E- > E-+ > E-++ > E > E+ > E++ > E +++

D- > D-+ > D-++ > D+++ > D > D+ > D ++ > D+++ (Average Tier)

C- > C-+ > C-++ > C > C+ > C-+ > C-++ > C+++

B- > B-+ > B-++ > B > B+ > B++ > B+++

A- > A-+ > A-++ > A > A+ > A++ > A+++ > AAA+ (High Tier)

Maidens level: (A+ - SS+++) (Depending on the person)

S- > S-+ > S-++ > S > S+ > S++ > S+++ > SS- > SS-+ > SS-++ > SS > SS+ > SS++ > SS+++ > SSS > ???

That's it for now, if you have a better idea or correct to any mistakes I made I will be happy to listen.

I don't feel like doing numbers so I did letters instead😅