i tryed the 9 ai, i even locked them in all the same team against me, dident really change anything, just more ships sitting around not attacking, slowing my pc
If you're up for just a little modding, change the "playerAIsharedDef" in the "Gameplay.constants" file. Using the agressive template as an example:
The major change is upping the Buildship allotment. I've been attacked by at least 60+ ships at once (from a single faction) with this setting and the AI continues to reinforce as well. Something about having "Buildship" above the 10 mark seems to make them more aggressive. Upping the UpgradeResearch speeds up the variety of ships that will attack as well as their upgrades for them.
Hope this helps some.