Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Terrorweave Leggings Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Terrorweave Leggings suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Similar Items
The 10 items nearest to Terrorweave Leggings (item level 50) in item level among Armor > Cloth, Legs slot, from item level 39 to 60.
Blizzard numbers items as they are created, so the named items next to ID 121326 (121321 to 121331) were usually added in the same batch as Terrorweave Leggings: the same quest line, zone, vendor or reward set.