#1 - April 30, 2016, 6:01 p.m.
By flicker I mean they appear and disappear fairly rapidly. Adjusting camera angle does not change the effect of it happening.
The Health Bars/Cast bars remain, as do the Wind/Tornado animations when going through the temple and some of the frost animations from the caster add.
http://i.imgur.com/4BFNF6J.jpg All my video settings in one place.
I was able to complete the quest after 3 attempts (with some noted difficulty of not being able to see the mobs haha)