I had a idea for new potions for alch and here it goes ill use an example i have too many times run out to a node and then realised i forgot to change schools i would love to see a craft school changing potion here is how i think it would have to be done
For fitter a potion using thge following fitting mallet+smelting tongs+mining pick and some orbs would allow you to change schools if its in your characters schools list