Nobody can "eat" an aura of protection. Not even the enemy nordics.
I can guarantee you your mother isn't powerful. It sounds like she is making it hard for you to meditate and perform our rituals because she is draining your energy.
First off, instead of fighting her just don't fight her, just detach her energy and completely ward it off.
When she tries to vamparize your energy just shut her energy off. Close your aura to her influence and flood yourself with white golden light.
Then shower her in Satanic blue fire. Don't look at her, completely ignore her whenever she yells at you.
Don't let her take you to her level. You are above that.
You need to clean your aura everyday, twice a day by bathing it in white golden light. Clean your room and concecrate it. Ward your room with Satanic blue fire. Everytime she tries to vamparize your energy just shut her down and block her out. It takes some practice, but once you break this control she has over you you can see how weak she is.
She is connecting with the enemy, as you say. The reason she is vamparizing your energy is because the enemy is constantly draining her energy, which has turned her into an energy vampire, she is sucking your energy to fuel her own aura, which is already filled with holes.
Just block her out, reinforce your aura of protection. Don't let her connect to any of your chakra's. You are the one with power, she has nothing. Don't argue with her. Don't give her any power over you.
When she starts yelling at you immedietly block out her energy and detach her energy from you, don't even listen to it, but try not to look down upon her as this will only antagonize her. Avoid uneccesary conflict by detaching her energy and blocking it out completely.
After a while she will start breaking down and tearing herself appart. Since when you block her out and detach her from you and don't let her back in, even when she manipulates you her aura starts to break appart because she connects to the enemy.
You need to be aware that no amount of manipulation works on you when you empower your mind and when you properly reinforce your aura of protection.
Trying to perform a black magic working in your current state isn't going to help because she will just continue draining your energy and your black magic working will backfire making your life even harder.
You must first fully detach her no matter how hard it seems and then build a proper aura of protection, everyday twice a day.
If you wake her up when meditating just vibrate the mantra's softly.
When you are living on your own in your own house and provide your own finances you can start to worry about performing black magic on her to deal justice. For now doing so will only make your life harder.
Ask Satan for protection and ask him to guide you if you aren't sure what you need to do to free yourself from your mothers manipulation and control.
We Satanists control our own destiny and our own lives. Your mother cannot vamparize your energy or manipulate you unless you let her in and allow her to do so.
HAIL SATAN!