Quote Originally Posted by everready View Post
Do we need to wear the old armor and helm all the time while doing these quests?
Yes, you have to wear both.

There was a noted issue before that the helm wasn't upgraded because some players tho they have the helm, have kept the helm on stash. The quest was completed but the helm wasnt upgraded. I'm not sure if STS has made a parameter to check whether the mythics is worn by the player before doing the quest line.