So in the comic, Lucifer is a true magnificent bastard, which means things (eventually) go his way, all the time. It's a part of his character! And being a part of his character, at least being super cautious and generally proactive is a part of being IC. In asgardeventide his powers are taken away, which of course includes the actual implementation of the occult, but that doesn't take away Lucifer's knowledge of it.

As such, Lux was half created as a bar, and half as a potential stronghold for him, should he ever get some of his power back. Because he's ridiculous and definitely patient, to say the least. He waited for the perfect opportunity to leave Hell, after all, and that was a long gig.

These probably won't mean anything, unless an event comes up where he gets some of his power back, but having them listed makes me feel better/more IC, haha.

( SO MUCH RESEARCH WHY )