Ember or Ardelia for healer in a physical team?

My physical team needs a healer, desperately. I don't know who here kept up with the beta, but the end game that was shown there and will likely be coming soon required a healer due to having corrosive fog challenges. I was planning to replace Chen with a healer due to a few things: she is low level on my account and I don't need her vulnerability application. (I have P1 PoG with perpetual ultimate uptime, so SP is not a problem and I can just spam Lifeng for stacks) So, the question is: Ember or Ardelia? I'm not sure which is better for physical teams. I looked through their kits and it seems like Ember will heal more consistently? Because I am a mobile player who doesn't understand what a dodge button is, I get hit plenty enough to trigger her combo skill. But people have been saying Ardelia is OP. I looked through her kit and it seemed like she was more arts focused than physical? She has physical susceptibility but you have to land a final strike on an enemy with no stacks to get it and that is very contrary to my 'infinite SP' playstyle. And Lifeng applies susceptibility too. Does it stack? Or would she literally just be a heal bot? Anyway, any suggestions on how to get some healing on a physical team?