Beams are troublesome in this regard, since they are the only weapons that can be dissipated with shields up, and that the higher techs are Very very beam resistant,
The issue I have with changing to kinetic is that I'd probably have to cut weapon damage in half to keep it where it's not overwhelming shields, but then it means they'll now do a quarter of the damage they used to do against armor, which will drag out fights enormously. But I can give that fix a try.
The nausicaa is the result of giving a civilian ship role to a corporation with a blank check to ensure their deliveries get through. Remove all the Pd, large weapons, excess luxuries and throw it all into armor and a good engine,
kind of like a blockade runner, there to get the job done, your best bet is probably a good salvo of reapers 1 or 2 will tear out all it's armor
Gonna patch this up with a change to the fighter role, since i find that support works really well with the new drones.