Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Fel-Hammered Greaves Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Fel-Hammered Greaves suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Fel-Hammered Greaves is part of the transmog set Armor of the Skyfather's Chosen (Hunter, Shaman and Evoker only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 134483 (134478 to 134489) were usually added in the same batch as Fel-Hammered Greaves: the same quest line, zone, vendor or reward set.