Hmm. Could be that you're right.

That's clever. Though maybe it's better to switch them around, because stray shots that are aimed for the Luxemburg are more likely to hit from the side facing it, than the side facing away. No?

This is how I configured their formation:

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2886624109

Also, like I mentioned they're not identical, they're mirror images of each other for maximum self-protection since the more vulnerable side (the one not covered by the shield) is towards the Luxemburg.

Yep, that's probably the best solution for the Luxemburg. Though, I've noticed that if your PD ships fly a bit too far to the side in the formation, the PD will shoot, but miss much more bullets, because it has trouble leading the missle as it flies at an angle relative to the position of the PD. So on board PD that can shoot at missiles almost straight ahead have a significant advantage.

I created two ships that were mirror images of each other called Dexter and Sinister. They now flank my Luxemburg when going into battle. No more PD on the Luxemburg.