For those having trouble with Hector. When you see a red ring around him make sure to double click away from him to order all your troops away from him because it will one shot most of them. I completed it using two medics (both blue) to heal everyone a paladin (orange) to take all Hector's melee attacks and an arquebrusier (green) for some extra damage and higher hit rating. All lvl. 30 and max gear but not max stats. Also don't ever use the paladin's skill bc. it will get killed quickly.
 "Valthirian Arc 2"){kind=icon}