add an amulet named "Advanced Atronach Amulet" wich have the advanced atronach effect
you can either get it from a chest next to the atronach stone
or craft it with: x1 Fire Salts, x1 Frost Salts, x1 Void Salts (no skill requiered)

what is the "Advanced Atronach" ? it's an exploit: by stacking restoration boost thanks to potion before activating the atronach stone, the stone will double it's effects, wich mean:
-100% Spell Absorption
-100% Magicka Degeneration
-100 Extra Magicka

and it's used in a lot of awesom skyrim build, here's a few exemples:

• The obsidian sentinel by Mason
• The twilight of meridia by the Teejiokno Noodlelords builder group
• The celestial warlock by Adrik
  

this mod will allow you to get acces to this power, without grinding alchemy

bugs: the effects may not correctly display in the active effects window, but they work correctly

install: put the .esp in your skyrim data folder

uninstall: remove the .esp