Well , it really is impossible to be great in every category. Beeing a Junker , my advise would be to go full anti-fighter since , at least from my expirience , we dont get attacked by anything bigger than gunboats. But I guess it all depends on what you are using the frigate for...
I think with 4 zoner turrets, and 1 missile one the back I should still be doing pretty good against fighters (you can press the fire fowrad key while attacking something in front of you and the back missile will still launch and then curve forward and attack).
I was just thinking of putting 1 big gun in the front only turret as a just in case I need to take out something better. or when i decided to go and pirate npc ships.
If I did decided to go back to 5 turrets and missile loadout. How feasible would all Cerebrus turrets be? I know it would do better against transports and up, but are those guns too slow for taking out fighters?