Blood Mage's Sanguimancy node is a complete disaster. Here's an idea to fix it
So the Life Remnants skill is essentially useless. Blood Mage is a dead ascendancy, actively makes your build worse, and needs to try something else.
I suggest that Sanguimancy instead read:
"Your skills cost Life instead of Mana. Your Mana is converted to Life."
No mana globe, and your mana gets compounded onto your life. There you go. It needs to be better than Blood Magic keystone, not worse...