A lot of mods add new weapons. Including PD. Some of them actually are viable.
But in vanilla, I still struggle. Dual Flaks seems to work okay. But most ships can not use it.
Most AI controlled cruisers struggle against a single drover.
I use the onslaught now, this ship shreds fighters quite good with Vulcans and flak. But it does not feel fun not to be able to use most ships as they fail to win against drovers.
IPDAI and Vulcans/LMG/DLMG. (Vulcans are best Vs missiles imo and still good enough Vs fighters) and then put normal kinetic weapons in your mid slots. Add turret gyros it’s you still have tracking issues.
IPDAI makes your weapons ignore flares and makes their target leading better. Ignoring flares is huge. And the target leasing effect vs small high transverse fighters is imperative.
Normal longer range kinetic in the mid slots (high burst ideal) because you can KO shielded fighters (which includes most bombers) on their approach better with long range weapons. Non-shielded fighters get shredded by the Vulcans
Integrated Point Defence AI also gives you a flat bonus to damaging missiles, making some weapons with good range/tracking but poor damage potential like PD/LR PD lasers and even Tac Lasers and Medium Lasers perform very well against high health misses like Squall. I've got some High Tech ship setups like the Aurora that are literally able to shoot a Hurricane MIRV down before the missile even spawns its submunitions thanks to IPDAI, Advanced Optics, ITU and Advanced Turret Gyros.
Big true also on Vulcans. They're the best anti missile tool for their OP since missiles only have hull hit points/no armor and the Vulcan does frag damage wich deals 200% damage to hull.
I find myself using kinetic PD over Vulcans if I have more issues against fighters than missiles and I already have Flak dealing HE damage. Vulcans will struggle against shielded/armored fighters but a combination of Kinetic bringing down shields and HE nullifying armor allowing kinetic to do full damage is lethal to any enemy fighter, even some mod ones with 1500 (or was it 1200? Can't remember) hull points, 200 armor and an Omni Shield (Immortal Assault Corvettes from Kadur Remnant).