OK, actually I thought it would be a good idea just to make a walkthrough from my point of view, as I designed the mission to be won through my way,
In the beginning, the Nightfall is beaming the Nefertiri to death; with your Stellito II's hurry over with all speed to the frontal beam cannons to knock out those beams before they do serious harm, like disabling the Nefertiri, which halves your potential anti-cap firepower against the Nightfall later on in the mission. Ensure that you aren't in the way of the LRed beams!!
With the remainder of the Stellito II's - you really only need one Stellito for each beam, do a bombing run, and knock out as many flak or missile launchers as you can.
By this time, the Nefertiri should have destroyed the Caerys, so just wait until the final waves of desperate Shivan pilots arrive. The survival rate of your wingmen increase significantly if you order them to protect the Nefertiri - thus all your wingmen together, not spread out over the Nightfall to be picked off at leisure. Watch out for the Durgas! They have EMP Adv. missiles so always be on the move. Watch out for Durga 4,5,6. I've specifically ordered them to destroy you, just to make things a little trickier.
Once the enemy fighters and bombers are down, sit back and relax as the Nefertiri and Mjolnir Defence 1 together destroy the Nightfall.
For your interest, I made the aim of the player to actually not gain as many kills as possible, but actually trying to stay alive throughout the entire mission.
-You must avoid being hit by LReds when attack the turrets
Sorry, this was a little long, but when you play the mission this information can show you why I did what I did.