Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Shadowspine Shoulderguards Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Shadowspine Shoulderguards suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Shadowspine Shoulderguards is part of the transmog set Mogu Lord's Regalia (Hunter, Shaman and Evoker only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Shadowspine Shoulderguards Fits
Other Items Named Shadowspine Shoulderguards
2 other items in the current build are also called Shadowspine Shoulderguards. 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 143981 (143976 to 143986) were usually added in the same batch as Shadowspine Shoulderguards: the same quest line, zone, vendor or reward set.