Hey guys, I don't know if this method has been mentioned for DV9K and GW2, but you can add a custom launch in Steam for GW2, and then add PROTON_USE_D9VK=1 %command% to the launch options. This should enable both DV9K and proton and lead to an FPS improvement. It seems to be much more stable in Guild Wars. I haven't had the chance to check it out in GW2.