Ok, I computed who would contribute to the max team score based on Nationals and Trials results: Biles, Hernandez, Raisman, Kocian, Skinner, Locklear. Not really a surprise. So how do we get that down to 5?
Basically, Biles, Hernandez, and Raisman are locks. Between Kocian and Locklear it makes more sense to take Kocian with a slightly higher beam score and routines on all 4 events.
So who's the last person?
Between Douglas, Nichols, Smith, and Skinner, each gymnast shines on one event. Looking within that group, Douglas has the highest AA score. Also, Douglas has capability on UB, where the rest of our team is not as strong. So basically she can contribute on bars and is a good back-up if the rest of the team falters on any event. Nichols, on the other hand, stands out on VT and FX where our team is already very strong.
I could also see an argument for Skinner since she has a high vault score and the capability to make event finals.
It would be interesting to try to pick a 4-person team from this mix, with an eye towards 2020. I guess it would be Biles, Hernandez, Raisman and Kocian.