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.
Mission Quest Chain: Burning Curiosity - The Reclusive Collector - The Keeper's Ring - Rings of Fire - Burn Out
Partisan Quest Chain: Burning Curiosity - The Reclusive Collector - The Keeper's Ring - A Dimming Light
Mission Quest Chain: The Doomscale Horde - The Defense of Lendiniara | Xulous Prime - The Legacy of Bayle | Saving Jacyll | Houses of Thex - Hate Rising | The Fall of Lord Bayle | Burn Out - A Guide Beyond the Rift - The Journey Home