Ever since patch 2.1 was initiated I am no longer able to play this game in any highly populated areas. Once I enter a highly populated area such as Crystal Tower, Revenant's Toll, and FATEs like Odin and Behemoth, the game will crash instantly.

For example, I was in a Crystal Tower run and as soon as the first area boss fight started, my game crashed. When I tried to log back in, the game crashes again even during the loading screen.

Example screenshot:

When in Revenant's Toll, the game will be running smooth for a few minutes, then crash with the same error message as shown in the pic above.
As far as the mega FATEs like Odin and Behemoth, as soon as I can "see" either mob, the game crashes.

I've tried changing video settings, dropping them to the minimum levels, but that does not help. It also doesn't matter if the game is in full screen mode, or windowed mode.
I'm running two Radeon HD 7870s, and I've tried with CrossFireX on and off. I've also checked to make sure I have the latest video drivers.
I have 32GB of RAM, and I do normally play through a RAMDrive (set to 16GB), but after this problem occurred I even tried playing from a HD like normal, but that does not fix the problem either.
At this point I'm really out of ideas, so if anyone can think of something I can try on my end, please let me know. Otherwise, SE please fix what you broke in the game since patch 2.1 was implemented.