Can you run a physical team without Chen?

I don't really like Chen and I wanted to do a physical team without her. Is it viable? I keep seeing online that she's irreplaceable in the physical team. I own PoG, and Ember. I just got Lifeng from the selector and after reading his skills can he not serve as the vulnerability stacker for the physical team? If you run Ember/catcher they'd be able to help stack vulnerabilities as well as provide sustain. For the last slot I was going to use Panda for the vulnerability on skill. Maybe Endmin. Is this not viable? Is Chen really irreplaceable? Or does she just make things more comfortable?