Read from the World of Warcraft client build files.
How Lightwarper Vestments Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Lightwarper Vestments suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Lightwarper Vestments is part of the transmog set Regalia of Dying Light (Priest only). The other 14 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Lightwarper Vestments Fits
Other Items Named Lightwarper Vestments
3 other items in the current build are also called Lightwarper Vestments. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 78635 (78629 to 78641) were usually added in the same batch as Lightwarper Vestments: the same quest line, zone, vendor or reward set.