Optimal settings that do not use full range?
DO NOT USE RANDOM 3DLUTs! That is going to do more harm than good. The differences between screens are as significant as the corrections so a random 3DLUT results in a randomly modified image.
Why did you enable gamma processing?! You use High debanding by default?! Using Image Enhancements with LumaSharpen, AdaptiveSharpen, and sharpen edges by default on all content? Ouch!
Using NGU very high for chroma?! Use high at most.
Using more sharpen edges, crispen edges, enhance detail, LumaSharpen, and AdaptiveSharpen all at the same time in upscaling refinement too!?!
Sorry, but this looks more like a guide of what you should not do to me. Way too much processing for default settings.