There are 15 Demon NMs in Dynamis-Xarcabard. Marquis Andras is the BST NM (found in the small wall structure south of the wall where the Vhazl crystal would be). He is next to Prince Seere (WHM) and Duke Gomory (MNK). These NMs always drop at least a 1 or 100 piece of currency, and a copy of Schultz' Stratagems (200~500 exp scroll). Occasionally, (Treasure Hunter helps a lot) these NMs will drop the the lvl 75 relic armor that corresponds to their job (i.e. Andras drops the Monster Gloves).
His pet vouivre drops nothing.