Pure speculation with no offense to the hard-working players:
I'm guessing that the McGee, Hicklen and Carlson additions are not yet official, meaning that we would only need to expose 7 players to the minor league phase.
I'd guess those would be: P Rafael Garcia, P Fray Morelo, OF Reidy Mercado, C Nick Kahle, INF Yonny Hernandez (hitting 2-for-49 in Venezuela), INF Jose Acosta and P Jeferson Figueroa.
However, if I assume that the McGee, Hicklen and Carlson additions are official, then I'd add OF Terence Doston, P Nick Bennett and P Christian Mejias.
Of course if we lose any players in the Major League phase of the Rule 5 draft (e.g. Evan McKendry, Cam Devanney, Freddy Zamora, Tobias Myers, Justin Yeager, Isaac Collins, Patrick Dorrian, Carlos D. Rodriguez, Alexander Cornielle), then we'd be able to protect more in the minor league phase.