Cas Team Help

Hi! I just got Cas but wondering if I should get her LC? I know it works really well with her given only 4 Remembrance LC options at the moment, but I also was thinking about Fugue LC for my break teams. I have FartFly and Fappa, and I feel like they'd really do well with the extra dmg amp. Was also thinking of getting E1 Ruan Mei since we get her for free.

For context, I have e1s1 Tribbie for Cas also and will be pulling for Hygiene.