How to reach 8.555 ー The glitchYou need to have Wrex alive and sabotage the cure. Without the glitch, Wrex will discover the lie and try to kill you after Priority: Citadel II when you try to go back to the Normandy. Triggering this scene will remove Wrex and the Clan Urdnot in the war assets listThe glitch is easy, when you want to leave the Citadel, simply go to a fast travel shuttle, then in a DLC area (Dr. Bryson's Lab or Silversun Strip)Then again the shuttle, and go back to the Normandy from here
2021 September 4, Paarnahkrin, “8.550 War Assets - How to achieve the highest possible score”, in Steam Community, archived from the original on 07 December 2021, Paarnahkrin's Guides