Fighter Strategies and Fleet Questions

[se5a]

im interested to.
one annoying thing I find is that the if you have two diferent designs of figters in your carrier/planet it just launches them in a group but they are mixed. so you have fighters with 9 engines and fighters with 5 engines all in the same group, its rather frustrating.

so which stratigy does it use if both designs have diferent stratagies?