Titans should have Lord Saladin, Jolder, or Radegast themed armor (Especially Saladin)
Warlocks- Felwinter, Skorri, or Timur themed armor
Hunters- Lady Efrideet, Gheleon, or Perun themed armor
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Fairly sure a good deal of the Iron Lords and Wolves don't even have designs. Even the Revenants in the Iron Tomb are the same model just three times.