The combat stats of this monster may have changed since the Evolution of Combat update, and have not yet been confirmed in the live game. You can help the community by verifying the information in-game and then
submit a report with your findings.
Defilers use a very long-ranged range attack. This range attack can also reach you if you have climbed the tower. If the gates are opened or destroyed, defilers can shoot through or over them and can hit your Void Knight.