your problem is this:
LimitForegroundFPS "1"
MaxForegroundFPS "100"
LimitBackgroundFPS "1"
MaxBackgroundFPS "15"
demonbuddy actually has a check box (enabled, by default) that forces diablo 3 to always run as if in the foreground.
You either disable that or set both MaxForegroundFPS and...
20+
But unless you have a dynamic IP (and you change it constantly), running that many on one machine is like a giant 'ban me' signal (in my opinion).
Edit: I doubt listing your power supply, water cooler, and fan models affect how many bots you can run...