Calabim are using skeletons properly -- had them in the stack, suicided them against my city prior to attacking with anything else and then summoned more to defend the stack. Their vampires however don't seem all that powerful, so I doubt they're really using the feast mechanic as well as they should. Also, more cases of sizable AI stacks of mostly archers wandering around outside cities not doing anything helpful, occasionally suiciding against the cities I took while they weren't defending. To be honest, I showed up with overwhelming force, so I don't think even a well managed defence wouldn't helped them much, but their defence was definitely far from optimal. Please teach the AI to *defend* with archers, not make them wander aimlessly and occasionally attack superior forces en masse.