Maybe make them the same speed as the ASMs and fire 5sec earlier, so they come in range first. If the enemy AMMs work as yours, then they'll always shoot the nearest one. You don't even need the sensor, just make them dumbfire missiles. Put what you can in warheads, after you matched the speed and range with your ASMs. If they get through, they'll even do some damage! Just remember to make your ASMs not bigger than size 6 in this case, as then they are easier to detect and will be the first ones targeted.
I used something a bit similar when I had to deal with PD platforms. I just tried to overwhelm them with size 1 missiles. Usually as the 2nd stage of a size 6 missile and then built for speed.
I wonder if you could try making giant 2-stage missiles in box launchers which split into 20 dummy warheads at close range to try and exhaust the AMM/ overwhelm PD in conjunction with a missile wave.
Of course you can!
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My empire is starting to overwhelm me...when a cargo TG tells me that it finished its job I often have no idea what the job in question was. Did they bring construction factories to one of the planets that are supposed to assemble their PDC (yeah, do it yourself safety!), or did they bring some DSTS somewhere? If so, where? And who needs prefabricated PDCs at the moment? And what the hell is this Gliese 588 the surveyors insist on having explored. I don't even know in which direction from Sol it is. And why are there never any NPRs, even with 90% chance to find some on proper planets? And why is my coffee empty again and who turned the sun off, it was just in the middle of the day, can't be late afternoon already, I have an empire to manage, dammit!
At least the colony fleets (all 14 of them) are all on repeat and most get their
victims pioneers from not-Terra - where I am missing about 60mil workers. Or scientists, or whatever.
BUT! I found two more systems with precursors, which gave me an excuse to build a new fleet (upgrading would have been 120-130% of the price. It has finished training, and as soon as the overhaul is done they will set spacesail and go punch the precursors. I don't even need FACs anymore, because my ships of the line are faster than their FACs. I have never before in a game researched such things as solid core antimatter drives. But I really just want to see those huge spinal lasers in action, even though 20cm lasers would probably be the best, as I could fire those every 5sec. The 60cm spinals and 35cm regulars ... not. And I already decided against 40cm ones.