I got my Aff hood yesterday (I switched loot spec from Dest to Aff to farm legendaries since I got 2 Dest specific ones - bracers and shoulders) and even though I got my dest shoulders around 3 weeks ago I was still able to get the hood yesterday. Between N NH and H NH, WQ on both BI and Broken Shore, daily dungeons, mythics - I will say (and I only have a small sample size) both my recent legendaries came from Broken Shore world bosses. I'm not sure if that's a coincidence but it seems they have a good chance.