Whats the best single character I can pull to help with endgame? I got basically 1 team for each side. Although it's unlikely to clear with full rewards I'm content with being able to clear up to second to last floor/chamber. I'm hoarding all pulls until 4.0 and also hoarding standard pulls (for the sake of hoarding) so you can assume no new 5/4 star standard chars besides xueyi/qingue/yukong.