This is maybe not the exact best place to mention this, but I may have stumbled onto some smarter AI. I'm playing a game with Ranged Bombardment, Opportunity Fire, and Archer Bombard, and instead of suiciding themselves against my defensive strengths, the barb slingers are pillaging all of my infrastructure and missing all of their attempted bombardments to the units I've tried to lure them with.
The settings are in RevDCM in the BUG. Maybe give it a try.