I need advise if pulling Lucilla would benefit my account

Hello, I wanted lucilla, but after pulling lucy, I’m contemplating if I should just skip and save for 3.5 characters. Here are my current teams im running

Hiyuki - lynae - chisa
Aemeath - denia - chisa
Phrolova - qiuyuan - cantarella
Lucy - rebecca - mornye

As you can see, I don’t really need to “free up lynae” as I dont have any other dps I could slot her into. I feel like maybe I should skip lucilla and go for suisui who is rumored to be a glacio support/ healer. That would allow me to run every team independently and not need chisa for two teams. But on the other hand, I hear lucilla is a good upgrade for hiyuki. Idk if anyone knows this, but would lynae work with suisui? What would you do in my situation?