Read from the World of Warcraft client build files.
How Wyrmstalker's Tunic Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Wyrmstalker's Tunic suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Wyrmstalker's Tunic is part of the transmog set Wyrmstalker Battlegear (Hunter only). The other 14 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Wyrmstalker's Tunic Fits
Other Items Named Wyrmstalker's Tunic
2 other items in the current build are also called Wyrmstalker's Tunic. 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 78756 (78751 to 78761) were usually added in the same batch as Wyrmstalker's Tunic: the same quest line, zone, vendor or reward set.