The NPC layer collision mesh in Aldur’thar has severe incongruities with the player layer collision mesh, resulting in frequent NPCs standing around evading.
In most areas of the game this would be a mild nuisance at most. However, the mobs inside Aldur’thur have abnormally strong spells. Not only do they cast mind blasts at their target while evading, but they also frequently sit around spamming their aoe knockback/manaburn at players attempting to close the gap.
These combine in a way that the mobs often end up causing their own evasion problem, and then enforcing it by chain punting the player to death with no available counterplay.