Horrific visions should have been nerfed or made non-mandatory. It's not that hard, but it's hard enough so you must pay full attention and it's repetitive enough that all the fun sucked after 50-th run and you need 150 more each taking 30 minutes.
Cloak progress should somewhat nerf those visions, so you could in the end just pull the entire zone and aoe it down along with bosses in a 5 minutes. That would be fun.