Here's some helpful tips on how to defeat this week's Tier 3 Court of Oryx "Kagoor".
Kagoor will be immune to all damage. The only way to temporarily drop her shields is to kill the yellow Ogre that she spawns on top of the platform with her.
What you want to do is bring that yellow ogre down to low health as you kill all the adds. Right before you kill the yellow ogre, make sure all adds are dead and all teammates are revived. Once the yellow ogre is dropped, bum rush Kagoor. No worries if you're unable to kill her on this first phase; just head back to the bottom middle and repeat.
You can check out the video below for demonstration:
Note: Killing Maleficent Eyes gives you a stacking buff called Ogre's Fury. The buff increases your damage to Ogres, allowing you to kill Ogre adds and the Servite Ogre faster. Each Maleficent Eye kill grants 1 stack of the buff, the buff lasts seconds and stacks up to 3 times.