So, you can spend 4 op for the range and burstyness of a Graviton Beam (Which technically would be better anti-armor being a delivery of 600 damage in a burst) that can't be retasked a PD and fire through your own ships, but then low tech ships can just flicker their sheilds unless you're right next to them with torpedoes ready to go or have enough nearby threat for them to be willing to risk an overload. And with how long flux disipation takes in this mod and how well the coding works, they're not going to do that unless they'd die anyway or have a good retreat path while overloaded. Or you're lucky.
Do you mean Gravitron "Driver" and not beam? You can always mix and match multiple weapon types in one group that will be fired together. For example, I can put my Gravitron Driver in a group together with Heavy Ion Cannon. In this situation, the enemy ship risks losing all frontal weapons if it ever thinks about lowering the shield.
Since the High-tech class isn't supposed to have a kinetic projectile weapon. The stat is lower than its ballistic counterpart to discourage usage but is still an option.
@Morrokain
Yeah, I always prefer it because it's dirt cheap and works pretty well. In a huge fight with 30+ crafts running at you, it also works great at mowing them down. Usually quicker than projectile PD but not as fast as AoE PD.