[Kameron8]

People who wear treads and stick their back to the map border invalidate the majority of Void Assassin. Anyone with medium to high dodge is almost completely invulnerable to Void Assassins. I'd reach for a 1 momentum spin around to address the first issue, and a bonus to hit while striking the back for the 2nd.

Source: 60+ Skill, 30+ Faith, 40+ Luck Duelist/Void Assassin who consistently reaches negative chance to hit with blessed daggers.