LOL Timestone - I just did that in a previous game. I closed all WP into my territory and only opened new ones when and where I wanted to send my stellar nuke in. It was expensive to run but kind of funny to watch the AI be totally helpless. I think after about 25 systems he was effectivly done in.
The Ai just doesnt seem capable of handling opening WP into your systems because even though he had the tech (I assume he did anyway since he out-teched me and was building planets) he never once opened a new portal into my core systems. If he had I would have been screwed because I had gotten lazy and had all my forces in one spot on the front line.
