Part 1, Part 2, Part 3, Part 3.5, Part 4, Part 5, Part 6, Part 6.5, Part 7, Part 7.5, Part 7.9, Part 8, Part 9, Part 10, Part 11.
Simple, the Citadel Guardians have no reason to have 5-A Striking Strength. Make it unknown as they've never shown to throw a punch.
On top of that, its durability...