Who should I pull for（；´д｀）ゞ

Literally all my characters T-T

Im thinking of picking Lucia and her W engine as my free S rank, and Ive just pulled Sunna for my Ysg team, got 10k polychromes left + anniv rewards. Just wanna know if Remielle is a must pull...or should i save up for Dailyn, Yuzuha and Yixuan? I really like Claret too~(>_<。)＼