[Neo]

My preferred design so far is kind of a hybrid - Nimble Fortress ships. They have has many engines and movement enhancers as possible, a goodly amount of defense, and just a few powerful guns, and maybe a couple of missiles on the larger ships for long range planetary bombardment. I also like to swarm then into large fleets up to about 30-40 ships if I can with support ships - repair, refueler, mine sweepers, and specialized boarding ships with tractor beams and shield, weapon and engine damagers.