[Arryn]

30g indy commanders with strat move 2 work reasonably well as ferrymen. Certainly better than wasting the time of your more expensive, magically-equipped, experienced national commanders.

What also works well is summoned commanders that don't have magic paths (the ones that do are best used for combat/forging/research) like Mound King (move 4/25), Black Hawk leaders that no longer have hawk troops (they've been killed off), Banes, etc.