[quote=@pr3acher]
[@Duthguy] Overlapping wrongs wouldn't be a problem, so don't worry about that. Both Sunny and Mera have navigation skills, but one uses the waves while the other winds. Same goes for marksmen with different weapons or doctors that practice different kinds of medicine.
[/quote]

Mera's also a little more suited to piloting the ship as opposed to charting a course from island to island. So her primary role would probably be helmsman (plus rescuing these DF users when they end up in the drink)