I followed the directions in this video and what an improvement!
This was way easier than manually installing reshade and sweetfx and then fine tuning the effects I'd want. Instead it took me about 5 mins and everything looks amazing.
Here are some before and after shots. Click on an image to open it in the lightbox image viewer, then hit the left and right arrows on the sides of the image to easily compare.
Guild Wars 2 Max settings:
Max settings with Reshade/SweetFX:
Guild Wars 2 Max settings:
Max settings with Reshade/SweetFX: