Sometimes, especially when I play the fast expanding TEC Rebels, I just put a space station in a gravity well and upgrade it with Last Resort. Kills entire fleets when it goes pop. Is this a sensible alternative to upgrading the stations armor and weapons? I mean, why do all that when last resort is essentially a small fleet killer? I can see building them for the long haul if I'm TEC-L, but with TEC-R, it's like all I need is a damage soak with a big boom. It especially comes in handy when I've expanded too fast (which tends to happen with TEC-R, especially with Goafan's mod) and I'm not sure if I can defend huge swaths of space. It frees up fleets.
Plus, its not all that expensive, and unless I'm mistaken, the base laser damage is like 100 per second.