The following pujas should be done for her:

• Dü kar: 150 times. To be done by the Gyurme Tantric College.
• Heart Sutra: 2,000 times. To be recited by the Tsawa Khamtsen.
• Chag sum

Then, these practices should be done for her rebirth, which is the most important thing:

• Read the Kangyur: This comes out very, very positive for her good rebirth.
• Offerings to the Sangha: This could be done anywhere, to create merit for her future rebirth.