Visible Armor

In Arcstone speak with Lady Usher and say "What armor" to be offered tasks for class specific visible armor. You will need a various "Spirit Mark of XYZ" for each piece:

In addition to the Spirit Mark (which are tradable) you need a matching Crafting Mold sold by Lady Usher for about 2000 plat. Hand both the Mark and Mold in to get your armor.

The Theater of Blood is like the old school Planes of Hate and Fear where each class has a set of unique gear which come from a specific mob type. The Chest and Legs only drop from the named version the mobs: