SS - Must ban / First pick, whichever team has any of these champions on their comp has an enormous advantage.
S+ / S - First pick worth, very solid champs and can be considered broken for some players.
S- - Very solid champs, usually not worth first picking, might work better than S+/S champs in certain situations.
A+ - Either very situational or just overall not good champs, none of these are completely useless though.
A - Terminus is a decent frontline but not worth picking in any scenario because of how bugged he still is.
B - Overall bad champs, usually a throw pick.
Pip is considered a flank/dmg here.
Grohk is considered a dmg here.