Two things are important to do in the land options.
One, define a landing point. Keep in mind that the landing point includes the orientation of the avatar.
Two, set teleport routing to "Anywhere". This will have avatars teleporting in without coordinates (e.g. with an OSW hop) land at your landing point instead of in the water. But everyone with a landmark will still be able to land where they've taken their landmarks.
like(2)