I'm with Neural. By the time wars and invasions become the norm in my games (I work the diplomacy to delay them as long as possible), it is almost impossible to find an enemy transport that is not fleeted, usually with 2-3 of the enemy's current 2nd strongest ship. The Thanlans love to escort with friggin' battleships!
I'm jealous. I wish I was playing with your version of the game and actually had to be afraid of enemy invasion by a technoligically superior force, and wasn't just "wack a moling" transports as they came in unescorted and defenseless, all game long. Maybe I just beat my large maps too soon before this "magical" period when the AI all of a sudden gets smart about it. Maybe something about my gamestyle keeps them from doing it. It may just be that the AI isn't smart enough to build sensor ships like players do, and cant make good advance decisions about ship movements.
I'm not saying Ive
never seen it happen, I just said theyre not reliable(almost never) about doing it, and the few(rare) times Ive seen it happen, its seemed more accidental than deliberate (they were grouped for one turn, the next turn they split up when the fleet found something to attack).
[Edit]
One qualifier I'll state here, is that maybe this has been completely fixed in 1.8. I haven't played 1.8, and likely won't with TotA on the horizon. The last games I played were in 1.7 beta, which had some broken AI issues, which perhaps didn't give me an accurate picture of the game. Up through version 1.6 of the game, the AI never landed on my worlds.I currently see no reason to ever be afraid of the AI in a war. They are not smart enough to take your planets. In the last 20 games Ive played, over the last year, they have never
once managed to land an invasion force on one of my worlds, and I seldom bother to even guard my worlds...most(90-95%) I leave defensless, with a single token outdated ship somewhere in the system to kill transports. They can only kill ships, and if you dont give them any ships to kill, they cant do anything but make faces at you from orbit. I play on large maps with abundant worlds, masochistic mostly, occasionally obscene, always conquest, so it's not like they don't have a chance...
I see it as the single biggest flaw in the game( the otherwise great game), and feel like it reduces us to "pretending" the AI can ever really be a threat, and playing on the top 3 difficulty settings where the AI can simply overwhelm us with bonuses, or attack us before we have any ships capable of defending. The AI, quite simply, is a "paper tiger", and any AI tweaks that dont go to solving this issue first, seem sort of pointless after a while.
The
only thing the AI can possibly do to you (unless you let them do something else), is blow up replaceable starbases (if you consider them useful enough to build them, but that is for another thread) or attack tradeships(if you consider them useful enough to build, but that is for another thread). Your fleets can be kept out of harms way, and they can't do anything to a planet without transports. Sooner or later theyll simply get bored and you can get a treaty. On the highest difficulties, they could potentially build trasports so fast(engine wise) they get around your defender I suppose, or invade you before you get your sensor ships up and "sneak" up on you ( I had this happen to me once in Dread Lords), but generally, early game diplomacy keeps this from happening.
It may be that this issue is simply more difficult to address than it would seem. What do I know about programming? I'm sure Stardock are all very smart individuals, and they would do something about it if they could. In which case I would say the current invasion system needs scrapped, and some system where enemy fleets can be a direct threat to planets, brought in (orbital bombardment, anyone?)