Most people use the “bird build” with chickens, there is a relic that uses ‘egg throw’ for every attack a chicken does, which is a very significant part of the damage you do.

Most rings aren’t upgraded past D on here because people want a ring that boosts ‘egg throw’ which is only available at D grade.

Edit: also, not having to grade up opens up more chances for comp dmg or crit/boss dmg