Strike craft don't have proper ability function.
For the Utility craft, you should be able to set the squad as mines and manage ability usage that way. The defensive strikecraft wont work that way though.
The only way to get ability function onto a proper fighter is by applying it from the host ship. You're also stuck with PhysicalDamageAsDamageDealer, or PhysicalDamageAsDamageTarget(only in Rebellion) for a method of blocking missiles.
Getting them to stay near your ships wont work out well, auto attack range isn't something to mod, it's a setting you can change in game. You could default it to local area, but that's it.