If each page is different, that does not make sense. Reusable elements are mainly a way to decrease maintenance costs, but if a reusable element is used once in a app, there’s no added value.
I would suggest to read @petter guide about reusable elements, you’ll see if they’re appropriate with your context : http://forum.bubble.io/t/a-guide-to-advanced-use-of-reusables/63884?u=christophe_hk