As of LU37 this is now a Persistent Instance. When having all four archetypes present (fighter, mage, priest, scout), you can skip some of the numerous trash mobs when beating the challenge of the NPC Askadian Adakus. He will give this challenge to a random archetype on each floor. Not having a player of this archetype present (not sure if mercenaries count) or failing to do the challenge, will result in the zone being more costly in terms of time. Names reward AA and are all soloable with mercenaries. (Note: Seed of Growth drops from trash mobs are still useful for making Scroll of Fire Seeds).
Kill all named mobs in each section in order to despawn the barriers blocking access to the next section.