Arrows in Heroes 2.

Trolls were among the most powerful archers – they could also regenerate. Of course, they can't compare to Titans, but I would give them second place. Centaurs are inconvenient as archers – they are large, too difficult to cover, and without cover, they die very quickly. Liches are simply amazing. The rest are roughly at the same level for me (not in terms of strength, but in terms of personal preference).