Vampire character with the Necromage perk and both the atronach as well as apprentice stones.
According to the wiki [See http://elderscrolls.wikia.com/wiki/Aetherial_Crown ] "If the http://elderscrolls.wikia.com/wiki/Dragonborn is a http://elderscrolls.wikia.com/wiki/Vampirism_%28Skyrim%29 with the http://elderscrolls.wikia.com/wiki/Restoration_%28Skyrim%29 http://elderscrolls.wikia.com/wiki/Perks http://elderscrolls.wikia.com/wiki/Necromage_%28Perk%29#Perks, the standing stone power in the Aetherial Crown is boosted with the 25% strength increase and 50% duration increase in accordance with the perk"
And "The 50% weakness to magic from the http://elderscrolls.wikia.com/wiki/Apprentice_Stone doubles the effects of spell absorption, thus increasing the amount http://elderscrolls.wikia.com/wiki/The_Atronach_Stone_%28Skyrim%29 absorbs"

I'll let you do the math on that, but essentially you're boosting the effects of the apprentice and atronach stone by 25% and the apprentice stone boosts the effect of the atronach stone by an addtional...75%?
I think that comes to about 150% magicka absorb xD

Actually the wiki page says at the base 50% weakness to magicka the apprentice stone DOUBLES the effectiveness of magicka absorb given by the atronach stone...so 75% weakness to magicka would relate to...what? A 150% boost?


My attempts at math--probably wrong so like I said I welcome anyone smarter than me to take a crack at it:

Apprentice Stone: 100% magicka regen, 50% weakness to magicka (BASE)
With necromage: 125% regen, and 75% weakness

Atronach Stone: fortify magicka +50, 50% spell absorption, magicka regenerates 50% slower (BASE)
With Necromage: magicka +62.5(?), 75% spell absorption, magicka regen 75% slower

Cumulative (using atherium crown):
BASE: +50 magicka, 100% spell absorption, 150% magicka regen (weakness to magicka is invalidated by 100% absorption)
w/NM: +62.5 magicka, 185% spell absorption, 150% magicka regen (weakness to magicka is invalidated by magicka absorption, which is offset by frost resistance and weakness to fire due to vampirism)

Remember to assume that your base magicka regen is 100%!

Mix in atronach perk for extra flavor!