I have a level 31 assassin (Argonian), a level 30 warrior (Nord), and a level 20 mage (High Elf).
Assassin didn't really use crafting, warrior smithed (full legendary Dragonbone), and mage enchants. Fortifying magicka, raising rate of magicka regeneration, and lowering cost of Destruction spells. I have almost 500 Magicka IIRC.
If they all got in a fight, my mage would
likely definitely win.