I have never done LAN connection. I tried joining through the ipv4 adress but it didnt work. I dont know if I need to change the UDP either. Am I supposed to be joining through the ipv4 adress?
You'd need to use local (192.168.*.*) IP shown when doing Win+R, "cmd", Enter, "ipconfig", Enter.
I think I fixed the stuttering. I added nucelarthrone.exe to my exclusions for my antivirus(malwarebytes). Just played and no lag, green bars when pressing tab now :)