Is this just 5 star fischl?

I just got lyneys bow and through farming for his set I think they gave me a fischl set instead? But is there any point to building her if I have Yae? PS: If you have any recommendations on how I can make my Yae better please lmk I know I have a lot to do.

I just got lyneys bow and through farming for his set I think they gave me a fischl set instead? But is there any point to building her if I have Yae? PS: If you have any recommendations on how I can make my Yae better please lmk I know I have a lot to do.