My PC Settings (massive updated at Jan-21-2024):
Multithreading: on
NotCPUCores: 1-2 core(s)/thread(s) for OBS and other cores/threads for system and the game (Separating CPU allocated to the game and system causes input lag)
Overclocking(CPU): 4.2Ghz@fixed frequency, 1.025V and disabled PBO(for less stuttering)

/-----important settings-----/
HAGS: on
Low Latency Mode: off
V-Sync: off
fps_max 144 // limited the framerate by the console command make less input lag than limited it by any other ways as I feels
Win32PrioritySeparation: 18
(Check this: https://www.xbitlabs.com/win32priorityseparation-performance/)

Take care about your router health with these
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces
TCPNoDelay: 1
TcpAckFrequency: 1

HKEY_CURRENT_USER\Control Panel\Accessibility\Keyboard Response
BounceTime: 0
DelayBeforeAcceptance: 0
Last BounceKey Setting: 0
Last Valid Delay: 0
Last Valid Repeat: 0
Last Valid Wait: 0

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Multimedia\SystemProfile\Tasks\Games
GPU Priority: 8
Priority: 6

MSI mode enabled and high:
USB x2, GPU and network
(just google about msi util v3)

Disable Peak Limiter(fix small sound effects maybe)
CUDA - Sysmem Fall Back Policy: Prefer No Sysmem Fallback(for GeForce users)

If you are trying ip address gacha with ipv6 to get a stable ping, switch to ipv4 preferred setting then gacha. Then switch to ipv6 preferred setting.