Thanks for the input. I totally forgot about passive sensors.
I rushed my engine tech, so I think I'm still a bit ahead of the NRPs. The fastest alien ship I have seen is 4500 km/s, so I'm hoping my speed will not be too much of a problem. I'm planning on fielding some corvettes and FACs going around 6000-8000 km/s to deal with anything too fast for my frigates.
If I dropped the range of my AS missiles to up the speed would 10m km still be fine for range? Not really sure what to aim for with speed/range for ASMs.
The PD fire control is short on range; your AMMs have twice the range of your fire control. They also seem a bit slow to me, but as long as they are faster than the enemy's attack missiles that isn't a huge issue. Hit chance is more important.
I don't know how likely I am to be going against size 8+ missiles but that meets the range of my AMM with the FC, so that's why it is lower for size 6 and smaller. I was trying to save on some tonnage but it might not be worth it. If I am likely to be against mostly smaller missiles then making a larger AMM FC does make sense.
4 AMM launchers and 72 AMMs are simply not enough. My dedicated AMM ships usually have 10 AMM launchers and a magazine loaded with 200 rounds per 5kt.
I'm hoping these won't have to do too much work on the AMM front, I'm planning on fielding smaller ships which are more dedicated for AMM work, to escort my frigates and larger ships, and later add some frigates/cruisers with a PD/AMM role to join the fleets of my slower ships. These were more an emergency measure and added because the design already had a magazine to store some AMMs. Do you think it might be best to leave the AMM work to escorts, or alternatively, make sure these have better AMM capability themselves?