Anyway, like many people I agree that destruction is broken at high levels. It simply doesn't scale and that's a problem. Other people have posted that it's totally viable by using enchanted gear to reduce magicka cost to zero and stun-locking enemies constantly with the impact perk.
Basic premise and idea of the build
So basically, the main premise and strategy of this build is CONTROL LEVELING. Destruction does not scale well at high levels so the idea behind this build is to keep your character at mid levels forever. There's a very simple way that you'll be accomplishing this feat:
YOU WILL ONLY USE TWO SKILLS: DESTRUCTION AND ALTERATION
Don't use conjuration, don't use alchemy, don't sneak anywhere, don't use weapons, don't wear any armor, don't smith any weapons, don't enchant anything, hell don't even pick locks. You MAY need
PROS: More exciting gameplay (IMO) than exploited magicka and stun-lock whittling your enemies down, More of your destruction spells will be useful at the end of the game, your companions (who don't level with you) won't become obsolete as fast.
CONS: Not very much leveling if you're someone who loves to gain levels, have to rely on found and purchased items and equipment, more reliance on potions and will have to buy them since you don't use alchemy.
http://www.ign.com/builds/the-elder-scrolls-5-skyrim/create?d=0000000000000000000000000000000000000000000000120000011110100000000000001013111113 - You will basically fill the Alteration tree and take most of the Destruction tree, but nothing else. This can all be accomplished by level 22. You could pick lightning instead of Fire, but stay away from Frost (too slow, to much magicka, too many resistant enemies). If you level past 22 you could take dual cast alteration but that's more of a convenience thing than a necessity. Also you can of course take impact and you will be more powerful, but I'm trying to avoid stun-lock battles as much as possible, paralyze and ice form/unrelenting force will be my crowd control.
Race: Any is fine but recommend Breton (for resist) or Altmer (for Magicka)
Standing stone: Lord - gives you extra armor and magic resistance
Equipment you will want: Archmage's Robes (complete the mage's guild quest ASAP), The Sanguine Rose to replace conjuration, Ring and/or circlet of fortify destruction (if only one is fortifying destruction have the other increasing magicka), and either Galdur's amulet or the Archmage's amulet. Non armor enchanted boots are hard to find, but there are some fire resist boots in the archmage's quarters. Not found any enchanted gloves.
Useful spells: All fire spells. Since you will be topping out in the 20's, all of your destruction spells will be useful all the way up until the end of the game. Some lightning spells also in case you encounter fire resistant enemies. Ebonyflesh, with mage armor it will be fairly effective armor. Parylize, this is an extremely powerful crowd control spell, you will use it often. Any other useful alteration spells like candlelight, detect life, and water breathing.

