I'm new to Standoff (and this site), but I just downloaded the whole package and I'm playing through. Great, great mod, by the way, Standoff crew!!!!
Anyway, I was stuck on the 4th mission of Episode 1--where you have to defend the Lionheart--for the same reason. I'd lost so many wingmen on previous missions that we only had 7 fighters going into this one, and while I could beat it, so many wingmen would die that we'd have to scrub the pirate base raid (having X number of wingmen survive wasn't listed as a mission objective, but I learned to my chagrin that it really was). I was playing on the middle difficulty--Ace, I believe?
Anyway, I went back and restarted the game, playing one difficulty level higher (4 out of 5), and all of a sudden, amazingly, the game got MUCH easier, mainly because my wingmen suddenly had a clue. Yes, the bad guys were smarter and the battles took a little longer, but as long as I flew smart, I got through without losing anyone. That mission with 12 good guys is so much easier than with 7.
I would assume this holds throughout the game. But question--am I suicidal for playing through on such a high difficulty?