For me, it looks like a tarot reading. Nothing that special or different enough to make it worth. It’s like, the effort on reading could be applied to building a relationship with one of these demons and asking them directly.
In fact, I don’t use any tarot anymore, not by myself. I always do divination by evoking some entity (generally Goetia ones) and asking him directly. I know that demands some “relationship” with these entities, but the outcome it’s impressive. It’s more like “build your own oracle” stuff. That’s why I didn’t enjoy his method at all.
But that was me, my own experiences. On this days, I don’t use tarot reading at all, sometimes a friend of mine trains his readings on me, but that’s all. If you’re on these kind of divination, maybe it’s worth a shot.