It sucks I can't declare war against the Procyon scourge. Luckily they've wedged themselves between a fallen empire and the largest member of my federation but the AI's cooperative actions are so limited. Together we have a combined fleet power of 100,000 but it's like asking the AI to assist you in destroying amoebas or crystalline entities. Even in normal wars all they do is find(max(playerFleetPower)) and use the waypoints of your biggest fleet. Seemingly no goals themselves.