actually, swarm attacks can prove very effective at destroying capships in renegade, although the precision strikes are enormously important in those cases (destroying the VLCA com antennas or damage guns).
Also, the ships have laser broadsides (turrets), extensive missile batteries AND spinal mount weapons (consider those heavy laser cannons similar to freespace 2's beam cannons) going right aft to stern of the ship), the shiva class even has a special forward one capable of cracking a planet's crust or frying other ships in a single salvo.
My plos would be the following (I'll make it quick).
campaign 1: (picks up just after the renegade: battle for jacob's star plot where supposidely, you defended the jacob's star system in the messana pocket (the band of territory going deep in TOG space in the shannedam county of the alaric grand dukedom:http://members.tripod.com/~Rintel/Data/Campaign3a.htm ). The TOG advance has been badly shaken and the moment for an effective counterattack couldn't have been better. Now that crucible command in jacob's star has been reinforced, It will be our coordinating center. The mission will be to prevent any retaliatory TOG attack on the messana pocket while finding the TOG C and C base in shannedam and destroying it. This should release the grip of the TOG in alaric.
campaign 2: With the destruction of the command TOG base in the remote system of sparta hill, we have confirmation that the TOG is hurting. Similar offensives have been mounted in the birchshire, pembroke, yoventrov and rift counties simultaneously and have left the enemy staggering. However, the analysis of the computer cores of the seneca class TOG cruiser "bane warder"before it's destruction has given us troubling rumours: This cruiser is TOG's cutting edge, available only in small numbers to the "lictor", the TOG's secret bureau, responsible of all covert operations and the information (albeit incomplete) we have extracted from it confirms abnormal enemy activity in the gilpin cosmic west fringe. the only thing we know of this TOG operation is it's codename: "vae victis". You are to depart from our newly established toenails in the rift county, and find the "vae victis" project, gain every possible amount of info on it and advise as to how to treat the menace, whatever it is. Our operations have finally left the enemy reeling in alaric, we cannot lose now.
Campaign 3: congratulation again to the 30425th for enabling swift capture of the vae victis installation. Our scientists confirm the fact that this device is not a weapon in itself, however, the news are far from good. The Vae victis project uses the unique properties of the newly named charon system's cluster of black holes to litterally shatter the limites of ship's faster than light engines, making jumps of unheard lengths by opening a T-space rift up to nearly any immaginable system and to suppress the effect of time (an effect we believe to be caused by the proximity of the black holes). Given to our enemies, this ability would enable them to hit our core command systems by leaping over the established frontline and crush us with ease. Yet the renegade covert operations bureau has come out with a plan: The station's personnel are continuing to transmit TOG progress data so with any luck, it will be a while before they know we have captured the device. Using the lictor seneca we captured at drydock, we will infiltrate TOG space were we are to head to new rome in absolute secrecy. Our ships, dubbed the tourmentor, will proceed to the heart of the TOG (although not by a direct route as the TOG core systems have been amputated from the station's map computer as a measure of precaution), through a series of quick jumps. Once there, you will have to destroy in one swift strike the imperial senate, effectively terminating ceaser julianus and his overlords. We have been informed by probing in the tourmentor's journal that the senate is due to a meeting in 2 months, which would be the decisive moment to strike. Should you be uncovered, contain the news of an invasion by terminating the enemy, feel free to use at will the captured TOG interceptors and remember that everything (including the dreaded imperial guards) will be intend on defending ceaser.
Campaign4: the attack has succeeded: new rome (incidentally known as earth) has been destroyed by an antimatter device triggered with the destruction of the senate building. The loss of nova roma has brought agony to the TOG. However, all is not yet done: we have observed rising factions emerging from the TOG's ruin, one of them being the lictor, headed by high praetor augustus tarquini. Others consisting of loyalists, or neo ceaser preachers. The TOG must not be allowed to reform. You are to fan the flames between the factions until war looses the attruition for them. It also can be counsidered a valid objective to separate the ssora from the humans and to bring the ssora to swear allegiance to the commonwhealth: their lost might would be a crippling blow to the factions. Once command approuves it, return to the entry system so the vae victis device can return you to commonwhealth space. We have taken alaric thanks to your efforts, the other dukedoms, much less protected as conquered since hundreds of hears by the TOG, will prove extremely easy to retake now, given the TOG's collapse.
Campaign5: you are back and have brought the mission we have given you to an astounding success: the factions are warring against themselves, once inferiour to us, we will invade former TOG space in order to prevent any such disaster from arising, the narams, baufrin and kessrith have been attributed their former systems and the ssora have signed their allegiance to the commonwhealth. Yet before vea victis was deactivated, the remains of the lictor invaded our systems again: high praetor augustus has taken command of ceaser's flagship: the imperator and is using it to create an orgy of destruction on peaceful uninhabited worlds. the imperator is the pride of the former TOG's naval fleet: a heavily modified shiva battleship, 25% bigger, with 3 special spinal mounts and a cloaking system (similar to those mounted on the lictor's pugio prototype fighters). The imperator must be stopped at all costs, before more casualties happen. Be warned, the lictor's very elite NYX squadron, will contest the planned destruction of augustus and the imperator.
WHEW!!!!!

Here's the story. hope you like it, and I hope I'll hear your comments on this.
best regards.
mike.