Depending how big of a price jump it is, the 3950x might be worth it having 4 more cores and 8 more threads. Also should take into consideration of heat generation from the pcs.
Single socket the only thing I can think of is a Thread ripper 3990x probably could if you're running stealth clients not mirror. I can run ~100 clients on my 3900x and a 3990x has over 5 times the cores so theoretically you can run 5 times the bots.
Damn dude 3080's/ti's for botting, big baller.
Probably 35-40 mirror and 25-30 mirror clients, assuming you're running mirror. If you limit fps to 20, probably can push near double that.
Either you need to remove Java 17, try running jar fix again and see if it adjusts everything to Java 8, open with command prompt using Java 8 directory, or try right clicking open with and choosing Java 8.