Guild Wars 2

I have seen this thread: https://forum-en.gw2archive.eu/forum/support/mac/Crashing-Issues/first#post4543916 and https://forum-en.gw2archive.eu/forum/support/mac/Graphical-Flicker-Mac-OS-X-Yosemite/first#post4570556 and can confirm that both of these problems happens to me also, except I have more errors to report. The above are quite minor. Below really makes the game unplayable.

Happens all the time in Tequatl. No matter what I do.
http://i.imgur.com/4OMEKSF.jpg

Also occasionally on the patcher. Quite rare, but does happen when it bugs out.
http://i.imgur.com/ezLVwHt.png

Or when leading temple runs…….?!?!?!?!?! (Very rare, happened twice inside AC and temples.)
http://i.imgur.com/tbUSlc8.png

Any ideas? I have already reformatted my entire drive and swapped out the hard drive. Still the same. I would provide more stats, if only they had more stats..

EDIT: It’s a daily occurrence, I’ll keep posting screenshots whenever I get them.
http://i.imgur.com/QBXaXhn.jpg – 20th Nov
http://i.imgur.com/rlasZFI.png – 20th Nov
http://i.imgur.com/4UaJGct.png – 20th Nov

iMac Specs:
27" 2560×1440 played in Windowed Mode
Mac OS X Yosemite 10.10.1
3.4GHz Intel Core i7
32GB 1600 MHz DDR3
NVIDIA GeForce GTX 675MX 1024MB

Added more pics