As u surely understand already, i like to play the "pure" classes. I don't like a character can make everything like sneak around, smith, and a few second after cast a fire storm. So This is my pure mage:
Breton lv 50
Alteration 100 master with atronach, mage armor3 and magical defense3
destruction 100 master with dual cast, enanched damage for every school but not he perks after (like incenerate low life enemy, ecc...)
Enchant 100 enchanter5, body ench, mind ench, and double ench (for me the best perk in this game)
Restoration 100 master with regenerate and necromage
Alchemy 100 alchemist5, healer, poisoner, filantropy (correct?), and i dunno why but i can skip to purity and snake blood directly...
Dress all robes and clothes
Head 25% less des and res
Body " " "
Gloves +25% potion pow, +62 magicka
Boots 37% resist fire and electricity
Ring 25% less for des and alter
Chain " " "
(don't like conjur school don't ask why but is not essential anyway

)
Dragon combat veeeeery easy
Dwemer sphere x 3 veeeeery hard .... I win anyway but i can't spend more attection in this kind of fight instead a boss or a dragon fight don't u think? I mean harkon combat 1 min...ancient dragon 1 min....dwemer sphere 2 min and a lot of damage almost dead....tell me where i did wrong or a better build...and i sure before level 50 falmer and dwemer was not so hard dungeon.