what dlc to buy for destiny 2?
All DLC would be best but every new DLC requires the previous so the order is: Curse of Osiris, Warmind, Forsaken, Year 2 Anual Pass... So start from top and go down, just make sure you're buying the best deal and don't double purchase (like getting Curse of Osiris and the Expansion Pass, as CoO comes in the pass.)