Does anyone have an idea how to use the banker’s inventory to its maximum potential? You can access the inventory in any map that has a banker. If you take your party member banker with you, his inventory cannot be accessed, but you can use him in your home. Shipping things home is pretty much a solved problem since if there’s a banker, there's probably a shipping box around as well, although you would have to pay the shipping fee. It also works in the reverse direction, when you need something sent to a map with a banker from your home, but I cannot think of a case where that’s useful.