SE4: Point defense ships, like in WW2. Good idea?

[Suicide Junkie]

Carrier Battles mod provides are pretty good justification for dedicated PD ships.
Rollo's AIs even build them!

[capnq]

I typically put my PD ships in the same hull size as my line ships, replacing all but one or two of the non-PD weapons with PD. Then I can give the PD ships the same strategy as the line ships, which usually keeps them fairly clumped together even after breaking formation.

[Azselendor]

Normally I drop 2-3 per ship on cruisers and up, the only time I've found a use for dedicated point defense ships is if I'm facing off against a lot of fighters or sats orbiting a planet.