Also, usually, in the cases where Staffcrafters/Wandmakers take other mage types as their apprentices, the apprentice mage will often go to either another Master or to the Academy for more advanced magical studies. Staffcrafters/Wandmakers can still be excellent at Potionry, Poisoncraft, Astrology, etc, since those fields don't require too powerful magic, so it essentially all depends on what you want North to excel at.
That above-mentioned reason is why Staffcrafters/Wandmakers can still become Professors at the Academy.
