It's been probably over a decade since I've played X-wing, but for some reason I'd like to say I sicced my wingmen on the TIE Fighters. When I was still learning the ropes of that mission I had a couple of fails related to them getting in the way (one got right between me and a dupe, and ended up getting a proton torp up his tail). I don't recall getting overly creative with wingmen - generally I just sicced them on things. Basically the key was to get to the dupes as fast as possible and then drop them with one torp apiece. If you have a good turn of speed and are good at evasive maneuvers, the escort eyeballs don't get many hits in.