At the risk of some thread necromancy, my two cents since I can't stop reading this thing and wanting to comment:
The only raids I've ever seen Gli and co do, there were defenders awake and aware. Several times they suddenly became much more numerous when the raid was sounded. Not to take away or demean Gli and co, but many of the successful raids happened not because Gli and co are some super proficient raiders who were just that much better, but because the people who were able to defend made no attempt to do so. There was one raid where I literally just followed Gli as she pushed the thing out of Khandava. There were five potential defenders in the realms at the time, but no one did anything.
There is no mechanical cure for lack of participation in the system, and something like obelisks and raid objectives both heavily favour people willing to invest heavily in the off-hour times, something that some people are simply unable to do. You can try to entice people more, but I doubt that would be successful without offering such an enticement as it would become problematic to other elements of the game design, and that isn't going to change the fact that any smart strategican is going to wait until their enemy is unable to present a proper defense to strike.
Personally, I no longer engage in the raid system because I didn't really feel there was any point sticking my neck out for a side that happily let me get jumped and die for some stretch after, and the orgcredits mostly all go to the same handful of people no matter what circle you're talking about. Not being one of those people, I have no impetus nor desire to participate beyond mostly-non-existent peer pressures.
While admitting I'm not the target audience for these systems, whereas I'm one of those weird strange people who prefers to just bash in peace, I find none of our mechanical systems beyond just duelling someone appealing as a means of PVP.
The circles used to be the central locus of conflict in the game, and without it being a three-sided affair, both current sides are losing any interest in engaging in these conflict systems. Magick would complain a lot about the serious amount of metagaming that goes on in the AM/Demonic circle, and to my knowledge and to be fair to the admin, at least some of that has been actioned. Meanwhile AM/demonic seem to complain largely that they cannot seem to present a unified front to Magick that seems effective. To the metagaming concerns, I leave that in the hands of the administration where appropriate. To the concerns about not being overcome Magick ... you guys would be steamrolling magick if you put forth the effort into a concerted offense, but to be blunt and probably bring all manner of disagreement upon me ... it looks to me like you'd rather sit and complain about not having an easy method forward which doesn't require that coordination, than actually put the time and effort into doing it.