Slots already on the Myth track or Radiance-crafted are not counted as a viable Voidcore drop upgrade due to the minimal change. The rest are open upgrade targets that a Myth drop cleanly fills.
Cost: 1 Voidcore per M+ roll · 2 Voidcores per Raid roll · Always check Great Vault before spending each week.
Ranks dungeons by the Myth-drop value still left in their loot pool. Spec BiS comes from Icy Veins (pulled live), trinket tiers from Liquid Armory, and armor popularity from Archon. Each pick is weighted by how much DPS its slot actually contributes (weapon & trinket ≈ 4×, neck & back ≈ 0.4×) and scaled by the ilvl jump a Myth 272 drop upgraded to 289 would give your currently equipped piece — so a Hero 6/6 slot earns a fraction of what an empty or Champion slot does. Paired slots (rings, trinkets, 1H weapons) cap at the number you can equip: surplus BiS ranks still render but score 0. Already-Myth slots score 0, Radiance-crafted slots score 20%. Mark items you've already dropped with × — they stop counting toward the score.
Slot coverage is approximate · Verify exact loot tables on Wowhead