Well, I hadn't seen them before, but now that you've shown them to me I need to get some!
They would be good as Pain Tokens for a Haemie, or even a DE diorama. As objective markers, I imagine they would work well, but I think that the incense burners should be replaced with something more DEldarish, as at the moment it looks like it could be a Daemonhost, or a prisoner of the Inquisition.