Vampirism and Necromancy

At a certain point in necromancy you will reach a fork in the path.
As death energy takes its first tolls on you, you must decide to either embrace vampirism or allow yourself to decay both mentality and physically.

Vampirism (draining the life force from other living creature) can help you gain back a portion of the energy you lose, slowing but not stopping the effects of exposure to death energy and thus goes hand in hand with necromancy.

Some choose against it for moral reasons, and ultimately that is their choice. I have made mine and in time anyone who walks the necromancer’s path will have to make theirs.

Hm, I’ve been a bit vampiric with the trees I pass, wind and weather, sun, but that’s the normal way in witchcraft what with the sunbathing and drawing down the moon. Only modern environmentalism has reminded me these aren’t endless power sources. And sapping from people, well yeah, like you said, rings some morality bells for me.

But there are other ways. Self-care spells work for me, at stopping the pull of energy away from myself and into the ground or whatever is holding me back and sapping from me. I’m also an introvert so alone time, a day of silence, binge reading for over 4hrs at a time, drawing, dancing and getting moving, oh and yoga! Don’t know whete the energy comes from, and laws of physics states energy cannot be created nor destroyed, only moved and morphed, but it also states a thing at rest wants to stay at rest etc and biology has shown that initially moving moving body to get blood going actually will increase energy to keep going (as long as everything else is healthy, get your vitamin d in folks.)

I imagine it’s a push of opposites. One must take time with the opposite energy one has worked with for so long, and have it change your own vibration, not delve into you and away from another.

I completely agree, however when it comes to necromancy we are faced with a massive and constant drain, one that would be difficult to counter naturally. 
If one looks back at historical examples of necromancy you can see extravagant feasts set up before or after the ritual to counteract the drain. Some stories and records showing that the older necromancers would start to appear like a rotting corpse, sunken eyes, pale skin etcetera as a result of this drain. Every time a person calls upon the dead they are giving a piece of themselves to have this audience. Life is what separates us from the afterlife, by giving life or destroying it we are creating a portal between this world and the next.

I agree (and have stated) that keeping a healthy body and mind is key to necromancy, however at some point, and many necromancers will agree, there is need for more power than we can naturally generate.
For further reading on the subject, i recommended:
Greek and Roman necromancy by Daniel Ogden, And Ars Falcis.