It finally dawned on me why fighters are attacked before capital ships. I thought it was either a bug or just ignorant combat tactics, but no, I get it now. The fighters aren't there to fill out the logistical points - they're there as ESCORTS. You have to blast your way past the escorts before you can get to the capital ship. I GET that now. Fine. Now I can put together more balanced fleets.
Anyway... Something went wrong in a battle I just had. I put together a fleet of three frigates, a heavy fighter and five or six escort fighters. I attacked first, so the enemy only got one shot before it died, but that one shot was at one of my frigates, not at any of the fighters. Why?
It was explained to me in another post that the AI chooses the most lethal, yet easiest to kill ship first. That was not the frigate. This is what my fleet looked like:
Frigate x 3 with 20HP + 6 lasers + 1 Stinger + 1 railgun
Heavy Fighter x 1 with 10 HP + 2 lasers + 1 Stinger
Escort Fighter x 5 or 6 with 6 HP + 1 laser + 1 armor + 1 beam protection + 1 missile protection
My frigates didn't have any defenses, because I thought it didn't need any with escorts along. I just packed it with as many weapons as would fit. It was still tougher than than any two or three of its escorts. If that's the only reason it was shot at, why didn't it shoot at the heavy fighter instead? It didn't have any protection either and it was easier to kill.