thatPolarBear I am not a fan of the 1 reactor to 1 shield configuration.
A single shield is overwhelmed too easily by focused fire in my experience at which point regeneration rate doesn't matter because the module will be blown up.
I have mostly used 1 reactor to 2 shields, something like this wall cell,
Though 1 reactor and 1 power storage to 2 shields likely has best cost effectiveness.
Also an idea from battleship design is "all or nothing defense". Shield some weapons heavily so they are hard to take out but have others that have no shielding to cheaply add more firepower.
As for another module, here's the core quad ion cannon array that is used on my more recent ships.
This of course should be embedded in more defenses that are mostly made up of armor.
