Yea but the PlanetKill thing works for destroying only regular Planet objs.
DQP systems will not have regular planets - they'll be planet SHIPs.
And if you guys checked my Tech Pack on BCFiles, it has a tech to allow the destruction of ships easily

However when destroying planet-ships no debris field is left in its place... Something that can be easily fixed tho

About damaging the planet-ship enough to leave a mark but not really destroying it, it is possible, but it depends on how Jb is creating the planet-ships in the system scripts. So better to wait his awnser on that lol