'Twincasting' the first healing spell is actually worse than just casting it once in each hand. Despite the fact that you might have ranged attacks, dragons are impossible to hit while in the air, so you end up fighting them similarly to a melee character. The options mostly add flavor to your character and little else. Few examples: Doesn't really matter if you go mace, sword or axe, fire, ice or lightning, or even two handed vs dual wielding. 'Headshots' don't matter, and most combat options in the game are poorly balanced.

Combat is too simple Fights within the game don't have very many options.