You can carry a game single-handedly with these heroes. Includes Hammer who is banned. Usually ranged poke with insane stacking and/or CDR, and some excellent healers.
Good in every game, can carry in the absence of Tier 1 heroes. Assassins with good range, solid AOE supports, and a few bruisers with good sustain.
Will usually pull their weight. Medium-range assassins, tanks, average AOE healers, those with solid wave clear.
Feels like you're playing with half a hero, or extremely niche. Either poor wave clear, a low health pool, poor healing output, or just undertuned.
Might as well be playing 4v5. Heroes you need to be close up to have an impact with, or heroes made for 3 lane maps instead of 1.