I've hit a campaign mission where I was up against a vastly superior enemy and the only way to resolve things was by forming alliances with several AI leaders. That *sounds* fine except that the absolutely passive allies of mine basically sat around, turtling up in their capitals for the entire war - leaving me to do 100% of the heavy lifting.
I still managed to win the scenario through a lucky strike that took out the AI capital and a hit-and-run mission to assassinate the enemy leader (who was away on errands or something) but I was losing 2-3 outposts per turn as the enemy just swept through my lands on an unstoppable murder spree. And all the while my "buddies" never lifted a damned finger (and this also includes the npc Autonom and Growth factions that I had convinced to join the war effort).
At any rate, my point is that missions that require you to rely on an AI ally are pretty weak when you can't count on the ally to invest any effort whatsoever. They're the 4X equivalent of an escort mission.
I still managed to win the scenario through a lucky strike that took out the AI capital and a hit-and-run mission to assassinate the enemy leader (who was away on errands or something) but I was losing 2-3 outposts per turn as the enemy just swept through my lands on an unstoppable murder spree. And all the while my "buddies" never lifted a damned finger (and this also includes the npc Autonom and Growth factions that I had convinced to join the war effort).
At any rate, my point is that missions that require you to rely on an AI ally are pretty weak when you can't count on the ally to invest any effort whatsoever. They're the 4X equivalent of an escort mission.