Blood Magic Gem + Auras

Hey ho, I feel that this is a stupid question. I am wondering if the Blood Magic support gem affects the %mana reservation of auras due to the xxx% mana multiplier.

Example: Using a 25% Mana reservation aura with a level 1 Blood Magic gem (245% Mana Multiplier): 25 * 2.45 = 61,25% Mana reservation?

Yes, Aura reservation does get increased by bloodmagic gem.

Auras on life are really only possible with the keystone and the -60% node behind it.
Combine that with Shav's Chest and you can get like many many auras, low life build.