Tasks go in - order, if an | exists it means you can do those in any order, but have to all be done to continue on to the end. If tasks aren't listed in a chain, they can be done at any time.

Quest Chain: Deliver Us Unto Evil - Them Bones - A Cure for Madness - Traitors Among Us - The Madness of King Tormax
Mercenary Quest Chain: This Can't Be Good! (East Wastes: Zeixshi-Kar's Awakening) - Stalking the Shadows (Crystal Caverns: Fragment of Fear) - Masters of Fear (Kael Drakkel: The King's Madness)