One tactic I've been using is keeping alive special forces guard posts on worlds I've captured. Apart from the small AI progress saving, the advantage is that it seems to cause the AIs to spend reinforcement points wastefully: when reinforcing a planet in which a special forces guard post is their only ship, all they get is a few dozen fleet ships. I can rapidly obliterate those with 20-30 turrets built with the special forces guard post just outside their range, and/or with captured ion cannons.
The problem with this tactic is that it's very easy to lose these "hostage" special forces guard posts to your own or allied ships. Culprits so far include:
* Human resistance fighters
* Zombie fleet ships from my botnet golem
* Sniper turrets I forgot to put back on low-power
* A newly-repaired artillery golem, which fired the instant it came online (I couldn't see any way to prevent that)
Apparently dyson gatlings also destroy special forces guard posts (
Mantis), and of course I can't use FRD on planets where I'm keeping a "hostage" post.
Two questions:
(1) Am I correct in believing the spawns I see around my "hostage" guard posts are costing the AIs reinforcement points?
If not, that renders my tactic invalid and my second question redundant...
(2) Is there any way to globally prevent friendly ships auto-attacking special forces guard post?
It's actually surprising to me that they do - it seems inconsistent with the way they treat all other AI progress-costing structures I've encountered so far.
My latest game is difficulty 9/9 against a Turtle and a Shield Ninny, so I'm sure you can appreciate I want to use any tactic to thwart AI reinforcements I can