Phoenix-D:
Yeah, it's rather frightening, I think that the total defense bonus using a race with an average ship defense stat is something along the lines of 150%. Even fighters with combat sensors are going to have a heck of a time hitting it reliably, and capships had better have a few talismans on board to have a chance.
Dragonlord:
I stumbled on the concept when I went MEE in this one game that I played, and my main fleets were off on the other end of the galaxy, and I didn't have the time or the resources to build and maintain a whole new fleet. So, the initial design for my Terror-class escort was born. The first vessel destroyed a total of nearly twenty planets by itself, most being small "buffer" colonies. The higher level the plague bomb, the faster the population dies, and the population keeps dying until a ship with a medical bay is put in orbit around the planet (since that day almost all of my space station designs have a medical bay on board over my most important planets, just in case). Smaller colony worlds usually die in one turn with plague level 5, homeworlds and largers colonies can Last for several turns with most of the lower level plagues, while level 5 usually rips huge chunks out of the population right away.
I don't know about using this tactic against humans, since it takes longer to research medical bays than plague bombs by a rather significant amount. It could be seen as cheap in PBW or PBEM, but I love using it against computers.
Another amusing note, before the emergency propulsion bug was fixed, I started a high tech game for the hell of it, made a baseship with loads of emergency propulsion, repair bays, quantum reactor, and a plague bomb level 5.
A baseship with enough propulsion to traverse the galaxy in one turn, enough repair bays to fix every emergency propulsion unit every turn...and all it needs to do is hit a planet once to doom it for all time.
It was so beautiful. If only I had remembered to put shields on it.
-Hotfoot
"Ah well, it was fun seeing something so big move so damn fast."