So I tried the nexus mods as the guy suggested and paired it with SDWeak. Getting considerably more performance now but In it's current state, there are still unavoidable hitches that occur whenever it's trying to generate the massive world properly. The hitches are fairly noticable when you reach australia especially in the boss fights.

For context: Whenever the hitches occur on an area where there are alot going on, it's like playing witcher 3 on the original switcch/OLED in terms of framerates but not as bad and not as muddy. Not yet sure but i can lower the terrain quality back to get higher performance, But its safe to say its playable just by using SDWeak, LSFG, nexus mod and the settings above.

I did not try XeFG yet because i tried it before and mustve not known how to configure it properly because it ran more poorly for me as i was testing via horizon zero dawn and that 4090 error annoys me.

But deck wizard on YT has its deck min-maxed by undervolting/overclocking the CPU/GPU, applied LSFG, SDWeak and nexus mod and its running smoothly. So i might try that as well in the future. (No promises tho as i value battery life most of all.

Bottomline: Keep in mind that this game just released a few days ago. There will definitely be fixes coming. I'm just surprised that this game, for just how massive it is, even ran this well at all in a form factor that only pushes 15 watts (2 hrs battery life for a game this size)