The Act 1a card for Midnight Masks instructs to "Find as many unique Cultist enemies as you can and add them to the Victory Display." It further clarifies that not all Cultist cards are in the set-aside Cultist deck.
Does this include one copy each of the Encounter cards "Acolyte" and "Wizard of the Order"? It seems these cards would qualify since they have the Cultist tagline at the top. However, neither of those cards gives Victory points, so I'm left scratching my head as to whether they count toward the 6-card threshold to advance the Act.