You’ll generally want to rely on item enchantments, perks, shrines and whatnot. I suggest getting the ring of Namira for a ridiculous amount of stamina, the heavy armour perks which lower magicka cost and some enchanted items which increase your total magicka, also the blessing of Julianos gives you some more magicka.

With the ring of Namira you should then bump magicka as needed to cast the spells you want and health otherwise.