I'm building Skirmish AI scripts myself and all three sides do attack quite aggressively although it you look in my thread here:
http://online.deezire.net/modules.ph...iewtopic&t=876
I'm still tweaking it!
How does your AIs attack? In huge numbers? Do they build decent base defenses with PowerPlants to supplement them? Does he build enough Hackers/BlackMarkets? Superweapons built - how many? Does he expand to supply sources and build defenses there?
I'm almost there and will share this with everyone to apply to their maps.