Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Jang-xi's Devastating Legplates Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Jang-xi's Devastating Legplates suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Jang-xi's Devastating Legplates is part of the transmog set Gatecrasher's Battleplate (Warrior, Paladin and Death Knight only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Jang-xi's Devastating Legplates Fits
Other Items Named Jang-xi's Devastating Legplates
2 other items in the current build are also called Jang-xi's Devastating Legplates. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Jang-xi's Devastating Legplates
Blizzard numbers items as they are created, so the named items next to ID 86803 (86798 to 86808) were usually added in the same batch as Jang-xi's Devastating Legplates: the same quest line, zone, vendor or reward set.