So if the Nictus have been on earth for many decades before the Warshades and Peacebringers came. And if the PB's are their mortal enemies. And supposing they prepared for the eventuality that their arch-enemies would come...couldn't they have been preparing weapons this whole time that could defeat their enemies when they finally arrived? Wouldn't they want to propagate that technology to any faction that would a.) use it to attack their foes, and b.) their foes would likely encounter?
I mean, let's face, this game isn't about winning Eisner awards here, but it's not so ludicrous to me in a world where I can never die, and always be teleported to the hospital at just the last possible second, no matter how much force is used against me.
Nictus, being kheldians themselves, are every bit as vulnerable (in the fluff at least) to quantum weapons as their good-guy counterparts. Propagating a technology liable to slaughter your own troops to groups who have no reason not to turn them on you is spectacularly stupid, even for a comic book villain.