He isn’t wearing a single piece of the blue season 1 gear in that clip. He’s literally wearing full PvE gear which he socketed with resilience gems to get to that number. There are priests alternatively that farmed 75k honor in a day on first 2 days of prepatch who have 4/5 pieces of the blue set and full set of off set pieces who have 400+ resil who easily survive this opener and then actually play the game.
Season 1 resilience rates are lower than future seasons, but trying to argue that lower resilience justifies getting 1 shot in an opener at a time when there is gear in the game that can prevent you from getting 1 shot to allow you to be competitive in the game but its locked behind a 300-400+ hour grind that’s impossible to attain for anyone who doesn’t have 16+ hours a day to play, its just braindead logic.