I (SCH) just Stoneskin everyone whenever I have the time. Shots or no shots. I had some trouble with the leg-grabbing mobs but never with the good captain's shots.

I think he does that shot straight after whenever he jumps at somebody. That's how I knew to ready an adlo.

I don't know if it's because my stoneskin prevented all damage but he kept shouting how impossible it was that he was missing all his shots.