I had an idea for a hybrid DoL/DoH class awhile back before 3.0 was released -- Mechanic. From a DoL standpoint, you could go on salvaging missions - picking up garlean/Allagan technology from abandoned airship/battle parts scattered from the fall of the moon. DoH-wise, they could craft thing that would augment airships or mounts. Jetpacks, anyone? Hoverboards?