Choices: NAVY m6 (19), ENVOY j8 (19), ENVY j8 (18), VAN j2 (24)
In Puzzle 3, you would like to balance rack while minimizing options for your opponent. While ENVOY scores the most points and keeps the best leave, it also leaves the O next to the bonus square, letting your opponent score well with a potential clunky rack. ENVY scores one less point and keeps a slightly worse leave, but is still a better play. However, NAVY is a better play since it keeps a slightly better leave (A and O are antisynergic) and blocking a decent scoring spot using column m.