My final play settings after much testing:
Notes:
In game, turned off:
Screenspace reflections (we have RT instead)
Film Grain
DoF
Motion Blur
Chroma
Lens flare
NVCP settings:
DLDSR 1.78x
Smoothing at 90%
There's a bug with the HDR where the nits level in the the settings measures higher than what's set. For my AW3424DW, using 800 nits eliminates the clipping and provide more detail in highlights. Thus my HDR settings:
max luminance = 800nits
Mid point (gamma/eotf) = 1.0
Paper white (HuD) = 100nits
FG below 60 is def not recommended to use. 60-80 is greatly improved. 80fps onwards is just smooth.