Please advise me on becoming a potential fellow main

Hello Sigrika Mains! I would like your advice on whether I should become a potential fellow main.

Although I'm not very sure about what she has to offer, I am aware that, at the very least, she is a Main DPS.

Roster-wise, I already have Qiuyuan, Ciaccona, and Lynae. Ciaccona, in particular, has her signature weapon, while Qiuyuan is on the Emerald of Genesis.

Although Qiuyuan is buffing Galbrena, I do not mind having him shared between Sigrika and Galbrena since Lynae herself is being shared with Aemeath and Luuk. Ciaccona, after an unfortunate series of pulling events, is also homeless for the time being.

Given this information, should I pull Sigrika? Thank you!