well, i would do it by session.
first, would be the "MILF" session. Lisa Ann, Jewel Jade, Francesca Le, Priya Rai and Persia Monir would be there.
then the "Asian" session: Asa Akira, Tia Ling and Jessica Bangkok
the last session would be about the "young one": Bree Olson, Kacey Jordan...