I would prefer the fighter drone approach to these countermeasures, really small fighter, with like a focused laser on or something, just so that whilst, they wont do much, theres more harassment going on.
However youve given me an idea, no idea if it would work
fighter hull, antimatter generator, nothing else = space mines, dock them in ships, and just lay them.
or hell do it as a fighter drone, but with antimatter gen on as power, have a tiny gun on so they have to get really close, then when they pop they "might" do some damage to the enemy, dont know how that would work tho in terms of antimatter damage as I aint a ner.... err a very smart person who could calculate the damage
but a fighter drone/countermeasure idea is pretty damn cool
could even design a special drone host sort of deal aka a carrier, that just has ship construction on, salvager, mining laser on, and tons of armor and shields that you launch with fleets, so it just sits back and builds as ships get destroyed...
does the standard carrier do that actually? never bothered looking at it