I do not quite understand how Castiel being Level 89 managed to create
Doom Noose Amulet Item Level: 92.
By the common Item Level equation for a
crafted item, Character Level 89 and
Amulet Item Level: 91 should yield
Amulet Item Level: 89 (which is insufficient to spawn
+2 to Paladin Skill Levels).
Character Level 89 needs
Amulet Item Level: 96 (or 97) to create
Amulet Item Level: 92.
However, no item drop source in the game is level 96 (or 97), and when Character Level is 89, maximum Gamble Item Level is 93 (89+4).