Could you please point me to the part of canon that shows that the Shivans know what destroyed the Lucifer, or that they even know it was destroyed at all?
Silent Threat.
The GTVA is aware of the success of the mission to destroy the
Lucifer. (They even reuse the FS1 end cutscene to show this, and you could still count 16 surviving GTA and PVN fighters in it.) There are significant Shivan forces left after the destruction of the Lucifer who are also probably aware of the battle and its outcome...or they're really stupid.
Depends on what the Shivan motivations are. If the Lucy is basically some sort of intelligence test (there was a B5 ep that dealt with a similar concept), designed to find out if the target is advanced enough to destroy her, or just advanced enough to be too dangerous to be allowed to continue living. Under that concept, they may say that it was a successful test.
Admittedly quite possible, but the situation we're dealing with is more along the lines of the episode with the Stribe.
Oh, yes. But does that mean it's important to the Shivans? Bottom line, from my POV, is that we have no clue at all at what scale the Shivans operate, or think on. You are assuming that a Lucifer would mean the same thing to them as an Orion would mean to the GTA. This is basically unknowable.
No such assumption is required; efficency is a basic goal of all living things. This is basically arguing that sentient species will
knowingly sustain a bad ship/weapon/product in service when there is an alternative. I tend towards the assumption that the Shivans probably had nigh-unlimited resources too, but that's not terribly germane.
The assumption that's necessary to make would instead be at what level do the Shivans cease to have any sort of concious control over what they use. Considering individual Shivans themselves are apparently cybernetically enhanced, this would place the level at which they can conciously control such things below that of a destroyer. If the
Lucifer remains in service, it is because something is preventing its being replaced.
@Nightmare: by your logic, they would have mothballed all Shivan ship classes that the Alliance has destroyed at least once, but yet we keep seeing weak ships like the Cain class in battle, and they have not been mothballed. So either there really was only one in existance, or the others simply didn't show up in FS2 since they wouldn't want to risk losing more of those special ships and by a supernova, and only necessary ships were put at risk. The Shivans only intended to destroy the star and not go on a full scale invasion. Why put the more special Lucifer class ships in the line of a supernova when they aren't needed to destroy the star and you can use the less special and no doubt more common ships, like the Ravanas and smaller vessels, which are sufficient, as distractions?
You're not reading my posts, so I'll try to summarize it again, though I doubt you'll read that either. It usually requires a degree of
effort to destroy a Cain. You can't take it down by 20% hull and watch it do the rest itself. Similarly you can't pit sixteen GTVA fightercraft against forty Shivan plus the Cain and usually expect to win.
You can do that with the Lucifer because the environment in which it's typically going to be destroyed strips its escorts of their strongest defenses, leaving them vunerable, and taking out the
Lucifer's reactors does not require inflicting major damage on the structure of the ship itself. We see a lot of Cains die, sure, but they die relatively harder.