As you all should know, a druid's essence-infused mushroom is no longer required to spawn Anzu. However if you bring a friend to the instance they can kill Anzu for you, get saved themself but you are not saved *and* eligible for loot.
Simply zone in after your friend has already pulled Anzu and is in combat, walk over to be in range of loot, and when the boss dies you can loot it without being saved to the instance. (Each time I tried this though the person farming the mount did not touch the boss at all.) So for as many friends as you have willing to save themselves to heroic Sethekk Halls, you can kill Anzu that many times a day.