Thanks for the responses.
Another question, do you you think it may be worth it to go fighters instead of ships?
In the unmodded game, fighters were too powerful, IMHO, and in Proportions, despite doing a damage of only 4 per gun, I have taken on Heavy Base ships with 200 fighters. Talk about X-wing fighters and the Death Star.
I'm fighting the Dopplenganger, and for some reason the AI insists in sending unescorted HeavyBaseships against my fleet of 3 carriers, despite being defeated time and again.
It think it have to do with the building.txt.
Maybe the dopplenganger AI its not optimazed for Proportions?