Well, I use rudementary state machines, if you'd call it that. There's switches and cases everywhere, based upon what the bot is (class) or where it is or what the bot is doing at the time, and I'm always keeping things in various different state registers and there's always something running, but I'm not using multithreading; sorta. The bots are multithreaded entities within one thread, and they all communicate to each other (if you ever watch a server or run the debug dll's)
Regardless a celeron can handle 24 of 'em and use all of our specials and weapons without blipping much on the CPU. Can't say much about the bridge traffic on slower machines; there's a lot packed into those packets. nyuck nyuck.