S+: These gods have an overpowered kit and little flaws. Usual banning phase.
S: Top tier gods, insane kit/damage/pressure.
S-: Strong kits, still some of your top picks.
A+: A bit over-average in their performance and/or kit.
A: Your average gods, nothing too special.
A-: Not in favor of meta or riskier to play / no early or late game.
B: These gods are not so viable right now. There are much better picks.
C: Any god(s) in this tier are hindering your teams overall performance. I would not suggest playing these gods.
D: Terrible kit and not seeing almost any play because they simply don't work.