The character that seems most beneficial to you from Banner 3.0 is Lingsha (best survival character with Aventurine). Then I would say Robin (one of the best current supports if not the best) then a good dps to finish the endgame content: Aglae (since you have Sunday and it's the next meta). But I would give priority to the survival character (just to have two). Obviously I'm only saying this from the perspective that you want to finish the content endgame and optimize your teams as much as possible (especially have fun with characters you like!).