What are some credible sources for Dao and Zen Mantras, Mudras, and Meditations, for the Dying?

My grandmother is close to death.

My Extended Family (Aunts Uncles Cousins) are a pack pessimistic angry fools that sap the life force from anyone around them.

I need some tools to help focus the energy in the immediate area during my grandmother’s dying process. And to Advert the torrent of negative chi that will be bombarding us from the family.

My Grandmother is not Buddhist or Doaist. she is Christian Lutheran actually. But she is open minded and willing to pray along with me for my sake at the vey least. She is a amature Theologist and has some experience with Eastern Spirituality, so she will be familiar with some of the concepts and practices we put forth in or meditations and mantras together.

I adhere to Daoist or Zen like path, though i am Slow in study of the actual practices, as i have lived thus far by the abstract principles and self guided meditation until now.

But as i will need to guide my grandmother’s meditations, i will require greater structure then my loosely translated and practiced mantras.

Thank you all in advance for your answers.

Aum ~ Sunyata Rakshasa