Maybe do kits in skyblock and that you get with a rank more items in a kit and that you can get with iron all items off the iron rank, lapis rank and normal rank and that you get with a gold rank all the items off the iron, lapis, stone rank etc.
in this suggestion it has indeed been suggested: https://www.cubecraft.net/threads/skyblock-ranked-kits-perms.227383/ and here: https://www.cubecraft.net/threads/ideas.226741/#post-1096479already been suggested, do research..