I can confirm that the Darkblade Helm drops on normal when entering the strike from destination selection instead of a playlist. I ran this strike for several days and gave up for a few days until the other night. I ran the strike and on my first attempt of the day it dropped so I got lucky, "Does Not Bow" still eludes me though. Remember Titans... "Eyes up Guardian" we don't give in as Titans, keep grinding, don't let Alak-Hul have a moments rest, and you'll eventually rip the helm from his dead corpse.