In the current game I'm playing, 11 Rangers have been found, all by my civilization. And wow, 2 fleets of 4 Rangers took out pretty much everything that got thrown at them. Rotate out the most damaged Ranger with one of the 3 spares, and it's non-stop destruction. I think they're all at around level 15. How many Rangers have you guys managed to collect?
And if I'm reading the ship info screen correctly, my rangers should have both missile and mass driver weapons/defenses, but when I have selected the ship, I only see mass driver attack/defense. Is that a bug or am I misreading that?