Damn, someone actually played this. Funny thing is, the captain has the triple attack skill... plus armor piercer, second wind, overhead blow, and uncanny dodge. So I found it interesting that you thought the knife guys gave you more trouble, lol.
i beat the captain before he had a chance to attack more than twice with that skill that hits 4 random targets, which'd be 4 hits straight to the captain + 2 of them were crits so i just got lucky