Can you get into Oola’s old lab

In my experience, trying to stay at range means you'll likely be ineffective and die soon enough. Getting in close, I managed to stay alive longer (though still eventually die) -- of course, there's pretty much no hope for a rez there. I'm not sure if this was simply because most people were at range and thus that's where he directed his fury or not, though.

I've run this event multiple times (glutton for punishment) and I haven't seen any better strategy than zerging and spawn rushing.

Edit in response to a comment: By at range, I meant the maximum distance for bow fire, so for me that was 1200m. That's where a great majority of people were dying, right past the bridge. By in close, I mean touching the mob practically.

Have you tried changing graphic settings?

Maybe you can isolate the culprit. It's usually caused by one thing in particular, this kind of problem. Try with everything in lowest setting possible, see if it produces the problem, and activate by steps to identify the cause.

It's not a solution, but if the issue is caused just by one level of detail in shadows, or shaders, you could have most of the max settings, and just one thing down, to work around the problem.

Of course, make sure also that you don't have some forced settings in the NVidia application.