Scenario two would be impossible(unless LoL SE) since STR still persists on Left side gear(unless they intend to remove STR from all Tank gear to date and beyond) and they did say that STR will be reduceeeddddddddd. Most likely it will be Vit = 100/Str = 0 or Vit = 70/ Str = 30(This being an indirect overall nerf to tank damage assuming accessory main stat scaling is the same).