Whether you retreat or fight really depends on the rest of the map and how its going so I dunno about that. But if you absolutely had to fight and had no station:
Have the two ISD's near eachother in line so that one isn't in front of the other. I would have one interdicter between the two and back a bit so that the missle effect is still in play but the interdictor won't be getting hammered by all enemy ships.
There are a few different things you could do with your tartans. Stormraider would probably support keeping them all in surprise but the problem with that is your enemy will assume you will have them. I would suggest having one be a front runner, taking as many bombers out as possible. Don't get me wrong, its a sacrifice. The problem with hiding all tartans is your ally will assume you have them in hiding. I would rather sacrifice one, then have the enemy think you have no more. The other two come up and blow up B wings and Y wings from behind the ISD's (and out of enemy line of sight) so you can punish the bombers since they likely would have no escort (because enemy thought you had no anti fighter)
Have your broadsides as far back as you can while still in range of Home One and the other Mon Cal. You should have multiple fighter squads covering them.
Have the victory between the two ISD's and infront of the interdicter.
Now that I have placement out of the way...
Target Home One with your Broadsides, bombing it from far away. Use the bombers you spawned out of ISDs to keep harassing Home One. You will want to blow up the corvettes quickly with the ISDs so I suggest concentrating fire on the ones closest to Home One, where your bombers will be. Once your ISD's kill all the gunships in range of your bombers, concentrate their fire on Home One, as it should be your goal to rid yourself of that bastard. After that goes, use bombers to kill a Nebulan B without attacking its shield (shield bonus can be made useless if you don't attack with lasers). Have your ISDs and Broadsides kill the other mon cal as quickly as possible. After that I would just mop up what you possibly can using as many counters as you have available and keeping in mind that killing ships is your goal, not wounding them as they will be fixed next turn.
I kinda ran outa time so this isn't perfect or horribly in depth but it should do for now. Stormraider will elaborate the points I left open, I'm sure.
PS: Didn't read closely enough to know you were playing computer. Keep all the tartans in back, don't sacrifice. It will be lost on the AI just because of its nature.
PS:
"It seems to me the humour of Sails is so dry you could strike a match on it and it would be the humour that caught fire." - Friend of Old[This message has been edited by GoSailing (edited 03-30-2007 @ 05:15 PM).]