Team Dungeon - White Succubus

I always use the lion.

I do it in groups, two teams at a time. One team enters the dream while the other doesn't, and we take turns.

To advance fully, you need damage dealers. Normally, it's 2 inside and 2 outside: When the boss tries to grab someone, everyone should run outside together, making sure the grabbed person is far from the boss. This makes it easier to control the poison pool's location when the boss casts it. Outside the dream, deal with the dark mobs, block the poison pool, and pull the boss away from sleeping targets. Inside the dream, break the dark succubus's defense. That's about it. If you're not tanky enough, you'll need to dodge the white succubus's circular charge. The rest is about defense break speed and firepower. Defense break usually isn't a major issue.