This looks huge. I'm hoping this all works out for you!Also, what about cauldron brewing and such? My memory might be a bit faded since I saw bits and pieces of the server. Just a suggestion I thought of, good luck :)
It is quite massive :) There will be potion making- that's part of the GUI. You will need the specific ingredients and have to perform operations in a certain order (e.g. stirring counterclockwise, adding an ingredient) based on the actual potion recipes. You need to acquire recipes for each individual potion.