Read from the World of Warcraft client build files.
How Demonic Combatant's Plate Shoulders Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Demonic Combatant's Plate Shoulders suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Demonic Combatant's Plate Shoulders is part of the transmog set Fierce Combatant's Plate Armor (Warrior only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Demonic Combatant's Plate Shoulders Fits
Other Items Named Demonic Combatant's Plate Shoulders
1 other item in the current build is also called Demonic Combatant's Plate Shoulders. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Demonic Combatant's Plate Shoulders
Blizzard numbers items as they are created, so the named items next to ID 150243 (150238 to 150248) were usually added in the same batch as Demonic Combatant's Plate Shoulders: the same quest line, zone, vendor or reward set.