After searching through the forums for the past hour and a half I'm finally deciding to post this myself.
Is there a way to get the bots under your command to use the cannons? Reload, and such, I don't really care if they can't aim. The reason I ask this is because it's basically one person (Unit commander) that is reloading and firing the cannon, while having a strong regiment of bodyguards. Not to mention how powerful those men are, seeing as they can hold their own against cav when they should easily fall to them.
How work arty bots in commander mode?