While I agree, they are characters that appear in the mainstream DCU, and have interacted with characters from it.
" Also, I think we should differentiate between humans and Gods/Abstracts. Lucifer/Darkseid/Himon/Dream understand the universe on far more levels than normal humans or aliens do. Or maybe I'm just overthinking this thread. "
On the other hand, no matter how smart an ant will get, it can never surpass the smartest human, so I am torn - on one hand you are correct about their intellect and understanding being superior, but on the other hand, the characters are eligible.