Personally, I included Maribel just because I've heard people say she's great during skill use, I missed her event lol. As for Bernice, idk why I left her out when she's my secondary tank after Gellius (Deine is just too expensive to use when I have so much OP ranged damage in Minerva, Nanaly, Aisha and Marius to bother with a tank that's slightly worse defensively but hits way harder)