I still think that you guys should not have brought the A-10
If you're referring to them being slow as stuff, the A10's slow transit speed has been mitigated by a little piece of reverse-engineered podtech called the Hyperwave Tug Module, which allows faster craft to "tow" slower planes at higher speeds. However, use of the Tug supersedes use of your weapon systems, and as such cannot be used in combat situations.
tl;dr you dont have to worry about slow planes making the whole squadron late to the party, unless there are more slow planes than fast ones.
If you're referring to them being useless in a dogfight, you are absolutely correct and bringing the A10s may very well have been a bad idea.
You meet up with the transport planes and set a course to intercept the train. Before long, an enemy air patrol spots you and moves on an intercept path with the transport planes.
Enemy forces in the area:
1x Sb-37 Viggen
2x Panavia Tornado
3x F-20 Tigershark