I'm still on that mission......
I'll go use the high-poly models and sit in the orion's fighterbay...
I usually get swamped one time or another... its hard to fight off 4 Mara with a Subach and Ahketon SDG, loaded with 25 rockeyes (surprizing good against the Rakshasa's fighterbeams, fast to fire, fast moving, and long range) and 80 hornets. I usually try to get some off me with the rockeyes in singlefire mode. Its hard to beat the mission... the Maras outnumber friendlies about 4-to-1 at times, if not more. The final fighter jumpin is the deadly one... you have to engage them because if you don't, they will all get on your tail with shivan swarms... a mix of luck and skill while flying an unmaneuverable heavy fighter... Its just like trying to take out Ulysses while in the original Herc... hard when theyre flying circles around you (literally).
But anyways, the bombers have to be taken out or the Orion will be destroyed... as you all know, Orions die against heavy bombers... when there are no AAAf beams on the sides, only on the top. You have to lean over the edge and fire about 2 salvos of doublefire against the dang bombers...
Insane is... well, insane. You die about three times on average, per mission. It will make you rethink Insane mode quickly...