I've been playing Korath for the last few games, on medium size and crippling difficulty. I love the spore ships, but I get an econ crash every game. I start the spore rollout, take a few planets, and bang! My econ goes down the tube. I end up cutting production and creating loads of colony ships (I haven't researched inavasion so I don't have troops) and ferry pop from existing worlds to try to get balanced again.
I'm thinking I need to take troop ships with my spores to get the pop up to OK levels asap after landing the spore.
Or is there soem basic trick I'm missing?
Your economy crashes because when you spore planets, the infrastructure remains intact. So maintenance costs get higher and higher every planet you take. There are no colonists so you have no tax revenue. Theres a few solutions:
With your starting points, try spending them on either pop growth + morale, or econ + morale. This will help with your economy no matter what approach you take. With political party, try either federalist or universalist.
Slow down your "massive" spore attacks until your own infrastructure can handle the load. Depending on the size galaxy, I would even consider making your capital the production planet and all the other ones simply economy planets. Don't forget your government techs, they help with econ and production.
Research fertility clinics and build them on your spored planets. They are cheap and your populaton will grow faster. Demolish stupid AI buildings you dont need that are just causing you to have higher maintenance costs.
If you want to be REALLY evil or roleplay, spore a planet them demolish the colony. That will show those bastards who's boss!