Okay, so you have more than 60hz monitor, and you have beefy pc (my spec is at the end, it's not the greatest, but it's a little above avg i believe)
You want the best graphic but also that extra silky smooth animation with this game.. but somehow that smoothness eludes you,, guess what? You're not alone!

i scourged forums and reddit to find that perfect spot, but somehow it just doesnt cut it..

the Biggest Problem is that this game has weird optimization. check out this video i made that compares the lowest and highest graphics setting

https://youtu.be/SpoERkDEbfI

as you can see at the beginning and at 1:30, the difference between lowest setting and highest graphics setting is only 10-20fps!! (check top right corner for fps counter)
not to mention the graphic at lowest does look horrendous

i think this is caused by driver and game engine issue... someone said that when he used the earlier nvidia driver they get stable 144fps with vsync on. drawback is random crashes...
i think i'll stick with latest driver (i'm using ver 398.82 released august 2018) rather than losing half an hour to an hour gameplay, thank you!

i believe sometime later the dev will fix this. but for the moment, if you are like me, you want to get the best graphic with the lowest cost (highest fps possible) then read on!

if you had already watched the full video, you would have known what setting to use..
from the maximum setting, i changed:
> Resolution Scaling: Highest to Variable (Prioritize Framerate)
> Volume Rendering Quality: Highest to Variable

these two are the main factor that caused the most stress to the GPU. unfortunately if you put it to low, it does make the image uglier.. Some people recommend turning off volume rendering (it will remove fogs etc) i'm sticking with it turned on since fogs creates nuances. and i love the nuances in this game

some people said that changing it to variable is bad idea. it may be is, but for my end, it doesnt affect negatively, in fact it makes the game still look good while increasing the fps alot! into the realm of lowest setting fps range!!
i know, it's weird. but that's how it is! believe me when i say i tried changing all the other settings too
i believe having it at variable is more taxing to CPU not GPU, that's why it doesn't tax my rig much (still have some spare cpu utilization)

last but not least, i changed Anti Aliasing from TAA to OFF
why? so the image looks sharper, unless you are using projector or big tv screen (which i believe won't support above 60hz?) chances are you won't be bothered by the more jagged edges
but this is personal preference, pick whatever you like. TAA also creates a somewhat motion blur

i admit that just because this is working wonderfully at my end, doesn't mean it will work the same at your end

ps. i've already played it for hours in SP and MP and no prob with this custom setting, but if you have different experience, and /or if you have a good suggestion, please post below and let's help each other out

my rig:
ryzen 7 1700 3.0Ghz
16gb ram
geforce 1080
Benq xl2411