In Gal Civ 2, there was an exploit (don't know if it ever got fixed) where certain modules like the Terran's warp bubble got obscence targetting priority. It became easy to create 1 ship with invincible defenses that everyone would target, leaving the rest of your fleet to be all guns.

I tried to test this out with the new targeting system. As my opponent at the time had fleets of all interceptors, I created a fleet of assault ships with 1 heavily armored guardian to see if I can draw in fire.

To my surprise it didn't work, the guardian ship was actually targetted second. I'm glad because its not an exploit, but leads to the question of how the targetting system actually works.

What does being a primary target due to the system exactly?