The exotic back pieces Symon’s History of Ascalon and Sights Be True are made with the armored scales materials. For all other purposes in crafting, armored scales produce Knight’s gear which has toughness, power, and precision. However the exotic quality back pieces made in the mystic forge have the stats toughness, power, and critical damage.
Toughness, power, and Crit damage exist on no other set I am aware of and I wonder is this intentional or some sort of mistake which is supposed to produce toughness, power, and precision stat combo?