Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Frost Witch's Legguards Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Frost Witch's Legguards suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Frost Witch's Legguards is part of the transmog set Frost Witch's Regalia (Shaman only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Frost Witch's Legguards Fits
Other Items Named Frost Witch's Legguards
1 other item in the current build is also called Frost Witch's Legguards. 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 50838 (50833 to 50844) were usually added in the same batch as Frost Witch's Legguards: the same quest line, zone, vendor or reward set.