1.) Certain classes/ranks are allowed to use different vanilla items. For example, there is a path (journey) players can take and level up their swords skill via mcMMO and when they hit a certain mcMMO level they will be leveled up and changed their rank. Now what I want is, I want only the higher ranked use the higher tier armor. So, I want the knights to be able to use the Iron armor with a diamond sword, while only the lower class, the apprentices can use chainmail, or leather and an iron sword.
2.) I would like a custom plugin that will make it so mobs drop gold nuggets, and these nuggets will be what drives the economy in game. The spin on this is, I don't want players being able to mine the gold. So I want all gold ore to be removed from the world as well.
This is easily doable, as I have several years' experience working with bukkit API and have written plugins that hooked into McMMO before. As for the gold part, that part should be relatively easy to do