Nice build, enjoyed the clips too. The only thing I have my doubts over in your build is whether magelight is worth it over Cauterize/FoO. You'll get major prophecy from both and instead of 7% more magicka you get either a strong HoT or the strongest DoT in the game.
For those that think about building the Spinner-Armor Master build, I would definitely grab couple of gold spinner rings from The Golden vendor (on the right now) and craft a heavy AM chest as well as a light piece. Cheaper and better min-maxing of stats instead of crafting AM rings.
EDIT: Also, if you have it, I reckon Perfected Blackrose Prison destro is better dmg than Willpower due to another 1500 spell pen on the front bar. Especially for those that build with less max magicka (FoO/Cauterize over Magelight)
I have some questions. Why not use igneous weapons for major sorcery instead of entropy? Pre buffing seems so much easier.
How did you get your health that high and still do enough damage with 1750ish spell damage and wearing a defensive armour set? Im guessing you have 810cp.
My Magdk has 2500 spell dmg buffed but I cant 1x3 or 4. I have to get in and get out quickly or i'll die if 3 or 4 people are hitting me with stuff.
I see the armor master combo a lot. Would fortified brass, spinners front bar be a decent alternative? To me, it's easier than having to worry about procing armor master every 10 seconds and the stats are very similar, minus the 5% max health.