Read from the World of Warcraft client build files.
How Nefarious Tormentor's Legguards Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Nefarious Tormentor's Legguards suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Nefarious Tormentor's Legguards is part of the transmog set Lurking Defiler's Scalemail (Hunter, Shaman and Evoker only). The other 16 pieces:
Items Numbered Next to Nefarious Tormentor's Legguards
Blizzard numbers items as they are created, so the named items next to ID 173450 (173445 to 173455) were usually added in the same batch as Nefarious Tormentor's Legguards: the same quest line, zone, vendor or reward set.