The vampire version of the build, having necromage, has 100% spell absorbption (I use summon arniel's shade to absorb it and recharge my magicka, it's useful in day light and costs 0 magicka)and -62% magicka regeneration(without counting Recovery2\2), +25% potions effectiveness and duration(the philter of the phantom lasts 45 secs), +50% effectiveness of illusion spells, +25% stealth\restoration spells(CoP)\alteration(paralysis) spells duration\enchantments\ALL shouts(I use Become Ethereal, Battle fury to buff Golldir, Dragon aspect, Marked for death before the Spiritually grounded move, Bend will rarely) some vampiric powers. I also use Mist form power in human form (it costs only 30 of magicka) via glitch as an Oh shit button.
The vampire version of the build, having necromage, has 100% spell absorbption (I use summon arniel's shade to absorb it and recharge my magicka, it's useful in day light and costs 0 magicka)and -62% magicka regeneration(without counting Recovery2\2), +25% potions effectiveness and duration(the philter of the phantom lasts 45 secs), +50% effectiveness of illusion spells, +25% stealth\restoration spells(CoP)\alteration(paralysis) spells duration\enchantments\ALL shouts(I use Become Ethereal, Battle fury to buff Golldir, Dragon aspect, Marked for death before the Spiritually grounded move, Bend will rarely) some vampiric powers. I also use Mist form power in human form (it costs only 30 of magicka) via glitch as an Oh shit button.