Need help with Furina constellation advice

So I really want Citlali and Skirk: I’ve been looking at leaks and they may appear in version 5.7 and 5.8. I have C3 furina and no 50/50. 30 pity with 50 wishes saved.

My question is is C4 Furina really worth it?

Used to be a whale/dolphin but now F2P 🤭😆