Read from the World of Warcraft client build files.
How Grievous Gladiator's Satin Robe Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Grievous Gladiator's Satin Robe suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Grievous Gladiator's Satin Robe is part of the transmog set Grievous Gladiator's Satin Armor (Priest only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Grievous Gladiator's Satin Robe Fits
Other Items Named Grievous Gladiator's Satin Robe
4 other items in the current build are also called Grievous Gladiator's Satin Robe. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Grievous Gladiator's Satin Robe
Blizzard numbers items as they are created, so the named items next to ID 100421 (100416 to 100426) were usually added in the same batch as Grievous Gladiator's Satin Robe: the same quest line, zone, vendor or reward set.