I think there are some good tips in this thread all ready,but honestly just to add. Think design over function. It makes little sense in a Final Fantasy to give way to practicality. Look at some of the Garlean armors, for instance. Do they really need odd T-shaped helmets with strange horn protrusions? The answer is yes,because they look sweet. I'm not saying that adding in functionality is a bad thing,just certainly not the basis for this particular design contest I feel.