Overtuned heroes, look to first pick or ban.
High impact, low variance hero choices.
Slightly more situational than tier A heroes, but can still be impactful with/against the right compositions.
*Kael'Thas S tier IF played by CPX
Niche heroes, should typically only be picked in order to counter the enemy team or play to map/team-specific goals.
Poor choices. Can almost always be substituted for a better hero.