Hello, I have normaly around ~50 ms, but I got to say, this game is old, the netcode is not good enough to handle 6-8k players online, the amount of delay makes normal gameplay unplayable, forget about pvp, even normal things like looting corpses are unbearable.
If the netcode cannot sustain that many players at the same time, there is only 1 thing to do, limit the amount of players and inject a queue system where idling players get kicked off.
Let's face it, when it comes down too it, how many players are actualy idling, taking up resources that are better spent on making the game more fluid? 30% ?
I read somewhere that your system can handle 5k players online without lag, if that's the case, you should probably stick too it.