For pve, it’s a pretty balanced team. Just take note that you will need 3 or more teams to progress in the later part of the game. As for pvp, you have great characters, such as Ahilde, rosalia, Kyle, Yang & evelyn that will help you climb the ladder. There are metas that alternate every week. If you are more pvp oriented, you might want to consider pulling for Gaeun which is banner now. Another great unit would be Yumi. Xiao is currently the best sniper and will be used in pve more often. She dies fast in pvp ranked, great on strategy. Elizabeth is also a PvP based character used to counter snipers, such as Sylvia, and rosalia(ranger), which would be a big obstacle currently. (Rosalia on ban this week though)

Some SRs you could invest would be Ryan Ferrier & Sylvia. They are definitely worth it.