Haven't tried with the more recent patches but this is what I was recommending before:
https://forums.overclockers.co.uk/posts/29987304
As I mentioned in that post some settings only make a 1-2% performance difference on average but seem to be the difference between the game feeling fairly smooth and feeling like performance is all over the place.
I'm not sure if they've fixed the rendering issue with very high shadow quality or not - one of the updates resulted in random holes appearing in the shadow map in places sometimes with horrid haloing of the shadow edges in places.
EDIT: Some suggestions that very high shadows render correctly in DX12 but still bugged in DX11 - not sure if that is right though.
https://forums.overclockers.co.uk/posts/29987304
As I mentioned in that post some settings only make a 1-2% performance difference on average but seem to be the difference between the game feeling fairly smooth and feeling like performance is all over the place.
I'm not sure if they've fixed the rendering issue with very high shadow quality or not - one of the updates resulted in random holes appearing in the shadow map in places sometimes with horrid haloing of the shadow edges in places.
EDIT: Some suggestions that very high shadows render correctly in DX12 but still bugged in DX11 - not sure if that is right though.