The armory chest is stupid, it should just be merged into the inventory. When I first heard about it I thought the whole point was to accommodate job changing so that you wouldn't find yourself in a situation where your inventory was full and you couldn't change jobs, but it doesn't prevent that from happening. In fact it makes it worse by giving you a set number of slots for every type of gear, so even if you have open inventory space and extra spots open for off hand or neck pieces you can't change jobs without manually moving rings to your inventory and then swapping. And it doesn't even tell you what tab is full when this happens. It's annoying and provides no real advantage over having just one big inventory, aside from maybe organization, but they could just modify the inventory so you could display only weapons or only pants or whatever, like how most RPG inventories work, but without limiting you to only a certain number of slots.