Legion of the dead

Hello everyone. I use @FraterMagni method to get a legion of dead. I ask Azrael to send me the legion. I gave them glass of water as offering. Frater said they are good with baneful workings.
I asked them to suck up the energy from my friend’s astral cord.
How long do you think that would take an entire legion to do?
No desire to live, Visualizing his death everyday for month. Spells and sigils cast.
Many death spirits and psychopomps called.
Is it really hard to destroy astral cord?

Could he possibly leave by tonight with all these powerful spirits sucking all the energy from astral cord?