Light cruiser, 2 Large-mount DU V cannons, 1 large-mount torpedo weapon. Two shields, six engines, Combat sensors, ecm and multiplex tracking. Armor sometimes, other times a supply storage unit. I group them together and mob the enemy.
Of course, since I use the EA bitmap set this ends up being my own little White Star Fleet.
I do build heavier ships, but I update these LCs as often as I can and use them to draw fire. The turbine formation is pretty good for them in tactical mode. Had twelve sitting on one of those double warp points that sometimes appear on cluster quadrants and found them neatly surrounding the enemy whenever they came through one of the warp points. Mayhem ensued as even ships with temporal weapons got nailed before they could use those darn shield/armor-skipping weapons. Muahaahhahahah.