And you can get a perk that reduces magicka cost by half. It seems you're missing the point. Magicka cost is there to balance the spellcasting.
Melee costs nothing, but you need to be close to attack the enemy.
Archery costs nothing and is ranged, but you must have quality arrows.
Spells are ranged and have infinite ammunition, but they cost magicka.
You can't rely on that perk alone to use high level destruction spells, you will only get about 4-5 spells dual casted at the most.
Arrows are so stupidly common, you can fire at the enemy for as long as you want with no drain on stamina (unless you zoom, which you don't need to do). Melee you can endlessly swing at the enemy with no stamina drain. Spells you are unable to use if you have zero magicka.
IMO there should be a cost for swinging an axe or shooting a bow, like there is for blocking and magicka. Not so high that you can only swing 3 times, similar in cost to blocking an enemy attack, which is reasonable.
Don't say I'm missing the point, just because you randomly talk about movement speed when I'm talking about stamina drain, you have missed the point when replying to my opinion. You keep desperately trying to seem superior on a games forum, give it up. You proved in your own thread how immature you are, so don't reply to this if your just trying to make me seem wrong, its my opinion.
As I said previously there is no possible way to be Destruction God.
Well you can exploit the system to have no cost for destruction spells, then stagger them until they die, you could kill a draugr deathlord with apprentice spells like this. I don't see the fun in being 'god' in any of the skills though, I did it for 1h in my first character, and it got boring very fast.