Welllll Marius of course gets his smart alec little brother Michael. More importantly, he gets Juno. But he can also have plot with my other ageless types. Briar, Esmé, Leander, etc. And, well, he might have to put up with David once in awhile by way of Finley, since Finley is Juno's favorite.
Galen also gets all of my Michael plot, probably more than Marius. Sorry Marius. But aside from that, again, he can have all my ageless types. I'm particularly fond of my Rose Reds making friends with angels, so I think he and Briar should definitely be friends. Also maybe some angel/demon plot with Tony before I kill him off.