Venom Geek Media did a great video on Orbital Fortifications needed and the doctrine behind it.
In general high level defense systems require:
- Massively Subspace Networked Defense Systems to feed data to each other
- Highly Redundant Distributed Command Centers (Don't put all your Command & Control baskets in 1x place)
- In the Defense situation, having a limited Borg like Distributed C&C system would be advantageous as long as the Distributed C&C is on planet or in system.
- In a Offensive role/situation for a naval fleet,
Heavy Networking / Distributed Automated Command could be very bad as we saw in the end of PIC S3 where the Borg Queen took over
- Having your own Counter Attack Fleet is a very nice to have (Not a necessary requirement, but preferable)