IDK... in Marvel, psychics can often interact with ghosts on the astral plane. That's not an ability that's common for DC's psychics from what I understand. So there's a good chance Deadman would be totally screwed in this fight if we're just talking about him in his ghost form. But I think he's got a lantern ring, and that could change things significantly.
Gender: Male Location: Planning to take over the WORLD!
i know he HAS been controlled via tp. deadman can be resisted when plot demands. i have a harder time seeing him take over selene than sersi for some reason. sersi's head isn't always her strongest asset. still, working together, i don't see dm being able to take either over for long. selene's magic (in some appearances) in very strong. she'd def be able to phukc him up if she has the chance.