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.