Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Swarm Monarch's Spaulders Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Swarm Monarch's Spaulders suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Similar Items
The 2 items nearest to Swarm Monarch's Spaulders (item level 437) in item level among Armor > Plate, Shoulder slot, from item level 447 to 545.
Blizzard numbers items as they are created, so the named items next to ID 221155 (221150 to 221160) were usually added in the same batch as Swarm Monarch's Spaulders: the same quest line, zone, vendor or reward set.