There aren't that many, are there? I think my personal Demonic Spiders were only Skelterild, Ryu Dragon, and Aura Lion/Keeba Tiger.

Some of it is just that it doesn't seem right to point out Demonic Spiders without the Bats since the former is derived from the latter, and a lot of dream eaters end up being Goddamned Bats given the right situation. Plus since it's YMMV, you have to consider that it might just end up being everyone editing to add on their personal annoyance Nightmare.