I don't think Jennifer Lawrence would fit this role at all. I don't really know a lot of actresses from memory. For some reason Léa Seydoux and Mackenzie Davis just popped into my head when thinking of Phyla. I've only seen Spectre with the first and The Martian with the second, and I don't really remember either of their characters well, so don't even really know if they're good actresses (and to be fair I don't remember either of those movies themselves well), but for some reason their faces popped into my head when thinking of Phyla.
Also, I'm considering whether I'd want her to look exactly like in the comics or if I'd prefer her to be a blue kree instead. Not sure yet.