[BengalTiger]

Rather than 25 corvettes I'd use 11 wings of strike craft, in attack groups based around the cheap GTB Boanerges, armed with some Stiletto bomb the size of a Helios (more technically: at least 10k subsystem damage per bomb).

This strike force would look more or less like this:

-3 wings of Boa bombers tasked with killing the Sathanas's engines (one wing per 2 engines; with each engine having 70k HP, they would need to score 7 direct hits on each one; they should come in wings of 5 or 6 to do the job faster)
-3 wings of Perseus fighters that would duke it out with enemy fighters (these ships should also come in wings of 6, one wing near the rear end, 2 on the sides of the front to cover bombers near each engine)
-1 wing of Erynies fighters for giving close escort to the bombers near the main engines (their large firepower would be usefull to quickly kill anything leaving the hangar bay)
-2 wings of Ares fighters, to provide area defence with Trebuchet missiles for the Boas attacking the 4 aux engines (one wing on the left and one on the right side of the Sath; they could actually come in wings of 2 and still do lots of damage).
-A few (2-3) wings of Artemis bombers would keep enemy turrets busy (and under constant attack)

That gives a total of 2-3 wings of 4 ships, 6 wings of 6 ships and 2 wings of 2 ships, or 52 ships max.

The whole idea is to disable the Sathanas, kill off as many fighters as possible, perhaps do some damage to any escorts, and then leave; all in 5-10 minutes not to allow the Shivans much time to swarm the place with fighters.

A single Hecate has around 150 ships on board. Let's say every single strike craft can go on a mission every 3 hours. Assuming there are no losses (or that replacements arrive just as fast as ships are lost) and that all units are dedicated to disabling Sathanasesesi's, each of the 80 Saths would be bombed every 3 days and 8 hours.
With 3 Hecates present, that would go to being disabled daily (or maybe: some Sathanases drifting in space, others needing engines fixed every couple hours).
Now enter the rest of the fleet (minus the few Aeolus cruisers escorting the Hecates) doing supply convoy hunts (or in case of Orions and Hatshepsuts and their strike craft- cruiser and destroyer hunts), and we might just have a chance in buying enough time to see what the Shivans' next unstoppable method of destroying us is.

[headdie]

This might sound weird, but IMO it has a point;

why not create an extremely large cannon (like 1000,000 mm for instance) to target the Sathani? All the GTVA will have to do is to estimate where the Saths are, point the cannon, and fire. The shell will probaly not stop moving due to Newton's Laws of Motion (however, there might be an object blockading the path, hopefully not). Saths don't have shields, right?

OR else,

counter a Sath with like twenty-five corvettes. They just have to do a flanking manuever. If the Sath tries to move around to counter them, just keep them moving; it's like a seal trying to evade a shark.

How do you move it? The vast amount of time required to reload it would be far longer than the time it takes for the sath behind the one you shot to recharge it's jump drives, jump to the gun, and blow it away. Far easier to just make the icanus (odd use of the word "just")

building on what commander zane said, what if the sath jumps out, calls for back up from at least another sath or simply releases hordes of bombers. In the time it takes for you to get it, or it's engines critical, it can jump away to get repaired and have wasted a whole lot of time and energy the corvettes used and gain time for the other Sathanas juggernauts to do who knows what. The Sathanas is sure to gain one if not multiple kills if the corvettes keep at it; shark's eat seals.

the other problem about 25 corvettes is getting that number of ships into place, I know it is in part due to FS engine limitations but from the way the game plays corvettes are though more common than destroyers are still relatively scares ships they have to release the lysader and actium from the NTF war just to do a little cruiser/destroyer hunt making me think that 25 might be the complement in a fleet

[General Battuta]

Rather than 25 corvettes I'd use 11 wings of strike craft, in attack groups based around the cheap GTB Boanerges, armed with some Stiletto bomb the size of a Helios (more technically: at least 10k subsystem damage per bomb).

This strike force would look more or less like this:

-3 wings of Boa bombers tasked with killing the Sathanas's engines (one wing per 2 engines; with each engine having 70k HP, they would need to score 7 direct hits on each one; they should come in wings of 5 or 6 to do the job faster)
-3 wings of Perseus fighters that would duke it out with enemy fighters (these ships should also come in wings of 6, one wing near the rear end, 2 on the sides of the front to cover bombers near each engine)
-1 wing of Erynies fighters for giving close escort to the bombers near the main engines (their large firepower would be usefull to quickly kill anything leaving the hangar bay)
-2 wings of Ares fighters, to provide area defence with Trebuchet missiles for the Boas attacking the 4 aux engines (one wing on the left and one on the right side of the Sath; they could actually come in wings of 2 and still do lots of damage).
-A few (2-3) wings of Artemis bombers would keep enemy turrets busy (and under constant attack)

That gives a total of 2-3 wings of 4 ships, 6 wings of 6 ships and 2 wings of 2 ships, or 52 ships max.

The whole idea is to disable the Sathanas, kill off as many fighters as possible, perhaps do some damage to any escorts, and then leave; all in 5-10 minutes not to allow the Shivans much time to swarm the place with fighters.

A single Hecate has around 150 ships on board. Let's say every single strike craft can go on a mission every 3 hours. Assuming there are no losses (or that replacements arrive just as fast as ships are lost) and that all units are dedicated to disabling Sathanasesesi's, each of the 80 Saths would be bombed every 3 days and 8 hours.
With 3 Hecates present, that would go to being disabled daily (or maybe: some Sathanases drifting in space, others needing engines fixed every couple hours).
Now enter the rest of the fleet (minus the few Aeolus cruisers escorting the Hecates) doing supply convoy hunts (or in case of Orions and Hatshepsuts and their strike craft- cruiser and destroyer hunts), and we might just have a chance in buying enough time to see what the Shivans' next unstoppable method of destroying us is.

This reads like one of those armchair admiral plans that rely on the enemy not doing anything, though. "Assuming that there are no losses" and whatnot.

Given the fighter capacity of a single Sath I'm not confident even a single one of these strikes would work. Remember that Bearbaiting occurred right after the Sath had reamed an entire blockade (presumably including far more than 11 wings of fighters.)