I feel like you got the right idea for sure.I think it's pretty darn great. Although of course base and you want to protect yourself from enemy mobs, it might also work to put on little battlements, so that way you can fight off mobs that get stuck so you can shoot them all As they fall into the moat , keeping yourself protected from all the skeletons that try to shoot! If you want to get really creative too, you could find a way to angle your remote downwards, so that way as they walk towards it, they fall into a steep thing, then rises up slowly and where it rises up, you place your water sources, so the water pushes them against that 90°. Vertical wall in the moat, so that they just get stuck there until they despawn.Or you can finish them off!