Should I pull for Odette+alyosha or save for a bow

I'm only thinking about using fischl (aggravate, OL(durin chev c6)) and on stellar conduct teams as well

I read people talking about lyiue banner (so polar star maybe)

Only bow that I have are rainbow bow, fav and the Viridescent Hunt

Tldr: should I pull for the new reaction and play fischl there, or save for a bow and upgrade her for my older teams

(Sry for rusty english)