PSA: It seems that in the Cloaked Ascendancy's campaign progression, it's better to immediately follow up "Investigate [Boss X]" with "Confront [Boss X]" instead of investigating the other two bosses first, as this apparently unlocks the weekly quest. My pet tank and I were not aware of this and therefore wasted some valuable progression time during which we could have already had access to the weekly.
I really like what they've done with the weekly mission in this zone. There are three bosses with strongly themed lairs (magic, fire, nature), and each one presents a slightly different challenge in terms of mechanics, not just focusing on combat. In the first you super-jump across floating platforms, in the second you dodge streams of fire and in the third you get to ride fey stags through an obstacle course before confronting the boss. You only actually have to face one of them each week too, so if not all of these mechanics float your boat, you can pick your favourite and just stick to that.
Even though we initially died many times before we got it right the first time, I think the stag ride in Nostura's realm is my personal favourite so far. The slight trippiness of it all somehow reminded me of Robot Attack Unicorn - thus I chose Erasure as my soundtrack when I recorded it: