I like the subach.
I did experiment with weapon combos before though.
Maxim + morning star. They both have the same rate of fire so they're absolutely great to link together. Morning star takes out shields and maxim takes out the hull. I stayed away from it because a target that gets shaken up by the morning star takes longer to kill rather than a ship just trying to run away from you.
Circe + Prometheus R. Depending on what you hit dead on, it can be a one hit kill. One hit kills with this combination usually worked on light fighters. On non light fighters, it incurred some very good damage. I imagine this weapon combo would be even better when it's circe + kayser.
Subach + Akheton SDG. This one has it's uses. It's also pretty effective at disabling fighters. The subach being an all purpose weapon combined with the subsystem disruptor that's great for taking out shields and subsystems...it's weird to use. Basically you punch through shields pretty fast with this one, then the fighter your chasing starts suffering from subsystem failure depending on what subsystems you happen to be hitting. Most of the time you end up taking out the engines on a fighter really fast and maybe their radar too. You use this combination if you don't want any kills. You end up in situations where you have to kill all enemy fighters, and all you can do is disable them really fast and move on to the next while your wingmates kill your paraplegics taking your kills.