Shipley wrestled Nataleigh Shane pretty tough in the finals at the Halls tournament. She's all gas and no breaks, constantly putting pressure on her opponent. Postlewaite is good too, but based on what I saw from Shipley against Shane at Halls even in a loss I went with Shipley.
All 4 of them (Shipley, Postlewaite, Cruz, Shelton) are in Region 1 so that will sort itself out soon enough with one or two of them likely to drop out of the top 6 after the dust settles.