I'd say Bone, since Fire Haven has ties with it. But we've just got a Bone Epic, so no.

Epic fluoress, light island's event is skypainting, skypainting's out of season event is in december so it could release during festival of yay. Fluoress was also the second to last single element magical to get its rare form following clackula.

Epic Rooba could go well, I mean just look at this

Rooba is circled

I want to get all the singles first before we move on to hybirds