Sweetspot for settings, override scripts and framerate/refreshrate

So i've been looking at some posts around here and such and frankly the deeper i go the more confused i get.

First of all my specs and settings

I've got a 165hz@1440p monitor, a ryzen 5 3600x, a 2070 super and i own svp 4 pro.
i use SVP with x64 Mpc-HC and MadVR, my madVR settings are not particularly high since i found the AI up scaling like NGU makes my Graphics card whine like a Tesla coil, i can add them if they are relevant.

Current settings are below

Found them randomly on a post somewhere and i thought they worked well in both anime and film with little amount of artifacts.
My cpu usage is about 15-25% at 120 fps and my gpu is anywhere from 40-60% depending on madvr this is usually 1080p upscaled to 1440p with these settings.(I usually don't watch content above 1080p because of file sizes, so 4k settings are not really relevant for me)
I wanted to find out if there is anything i can do to get better quality when i have this much performance overhead. Any suggestions?

The first thing i looked at was using exact multiples of source and then some sorta wonky stuff with my refresh rate from this post:

https://www.svp-team.com/forum/viewtopic.php?id=3549

And i want to make sure i've got the settings right, they are below

Because i'm really not sure how i should handle the different frame rates when my display is capable of 165 fps.
Btw my display if fully g-sync integrated, can i just use g-sync for svp and how do i do that?

Next i found some stuff which seems kinda esoteric but i'm still interested
The first i found was these Override settings from here: https://pastebin.com/KG4FsHjx
Im not sure i even got them working, i backed up my override.js and them pasted them in, found it a svp4/scripts directory.
i've got no idea if it changed anything, did i do it right? Additionally i had a suspicion that i had to activate it through user defined settings but i had no idea how to get that working.

Also found this: https://imgur.com/a/mjDjs
Is it worth adding? and how would i add it?
I also saw the thread was a bit old, is it outdated? and is there never/better stuff?
Lastly, anything i missed that i can use to get better quality?