You could periodically order every computer-controlled hero to attack a random enemy hero.
Though that'd be Artificial Stupidity more than anything.
Though, if you're skilled enough, you could expand that slightly.
Make the AI retreat if it's low on health, cast spells when it has mana, etc.
Then continue doing so, taking certain things into account. Maybe attack even if it's low on health, assuming it has windwalk and mana, etc.
I believe this is how even the most complex AIs are created. (Start simple, and keep adding things onto it)
I do know this - xenforo dropped the ball by not keeping the vbulletin reputation comments as a feature. The loss of the Reputation comments data when we switched to Xenforo really was the death knell for the site when it came to all the users that left. I know I missed it so much and I got way less interested in the site when that feature was gone and I run the site.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory