Shadow of war how to lvl up undead orcs glitch (read description for step by step)

1: reserecte your orc follower 2: move him to the garrison 3: place him in an area (i think it works if u place him in the area he was before) 4: get him to win missions to lvl up (they do earn skills not sure about loosing weaknesses though) Note:theres a chance they may get there personality back but it depends of how much the game breaks MIDDLE-EARTH: SHADOW OF WAR https://store.playstation.com/#!/en-us/tid=CUSA04408_00