Who should I grab?

I have basically all of the six stars except for Ember, Angelina, and Yvonne. I have no interest in Ember, so now I need to know whose dupes are the best. I have one dupe for Lifeng and another for Pog. All from the free standard pulls somehow. I think this is a general enough question for people that got lucky, but if mods want me to move this to the megathread I will.