Read from the World of Warcraft client build files.
How Deepfiend Shoulderpads Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Deepfiend Shoulderpads suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Blizzard numbers items as they are created, so the named items next to ID 223395 (223390 to 223400) were usually added in the same batch as Deepfiend Shoulderpads: the same quest line, zone, vendor or reward set.