Hmmm.
Not sure I have specifics for the roles, but I'd love them to cast 1 actress each for Mab+Titania and for Maeve+Aurora.
Winter/Summer colors for makeup & wigs, but play up how similar they LOOK (apart from colorschemes) but how different their MANNERISMS (we'd need decent acting chops, with an ability to do some scenery-chewing -- none of them are mellow, laid-back characters!).