Well... there is no chronology. Palace of the Dead does belongs to Heavensward. But, you can do it without completing Tam Tara HM. It only needs to finish Copperbell Mines Normal from ARR and the purchase of Heavensward.
Speaking of Heavensward: Before entering Ishgard, you have to do the whole Main Story from ARR. Isnt it weird, not having Tam Tara HM competed first, BEFORE entering Palace of the Dead?
Quote:
[2.0][3.0]: These additions and adjustments contain elements that may require the purchase and registration of FINAL FANTASY XIV: Heavensward.
[2.0][3.0] Deep Dungeon - Palace of the Dead has been added.
Entry Requirements:
- Disciple of War or Magic level 17
- Players must first complete the main scenario quest "Into a Copper Hell."
