I will point out that those Cantrips would be pretty darn useful for a sailor too.
In the day of sail you would be hard pressed to come up with a reason for a Sage to use Mending or Prestidigitation before a sailor would use those. Lines and sails were constantly parting, this was a regular problem on sailing vessels, and then for prestidigitation cleaning (swabbing) the deck and careening the hull.
I would put Find Familiar on there too as more useful for a sailor. Not sure what that familiar would actually do for a Sage, but a sailor; tons of uses - Fly your crow up to the top of the mast (or even higher above the ship) and look out through his eyes instead of someone climbing to the crows nest for a lower vantage. Send the Quipper under the ship to see what is fouling the anchor and then maybe even summon a crab to clean it off.
But I bet that is not an option on the Sailor background.