A question of damage...

[Freepaperclips]

I have a question on how damage is applied when using skills like Vengeance or Berserk: I recently picked up a Headstriker unique Battle Sword and was wondering if the Deadly Strike ability was calculated before or after the elemental damages of Vengeance or Berserk. A related question would be: if you have Deadly Strike on another item, would it apply before or after the fire damage on Dragon Tail? What about the damage conversion of Fire Arrow or Cold Arrow? Anyway, thanks for your help!