My very dear Richard,
Your daughter should drink Maratika water a few times a day. She should drink it one time then have a break, then drink more, then have a break. So she should drink like this throughout the day for a few days, until the water is finished.
Then, if possible she should take the eight Mahayana precepts a few times, but first she has to receive the lineage of the precepts from someone and that person she has to regard as guru. Once she has the lineage, she can take the precepts by herself. Taking the eight Mahayana precepts creates unbelievable merit and will help to control her suffering, which is the result of past negative karma, so taking the precepts purifies that negative karma.
Also, she should recite Black Manjushri mantra maybe 15 times a day. It’s Manjushri but black. As she recites the mantra, Manjushri sends beams to her that purify all her gross and subtle negative karma and she receives all the realizations that Manjushri has: guru devotion, renunciation, bodhicitta, right view, two stages of tantra and she thinks that she has received enlightenment. Every day, 15 times, make strong prayer to meet with Black Manjushri.
Then if she has understanding, a capable mind, if she can do tong-len it’s the best practice. So many times skies of merits are collected; it’s unbelievable, unbelievable, unbelievable purification. You actually want sentient beings’ sufferings and the cause of sufferings; you want to experience everything, but by that power, the disease that you have can get recovered. So if she wants to practice tong-len, then we can send the information.
Please pass this message to her: “I am very sorry to hear that you have been so depressed, but I will pray for you to recover and have a very healthy life and a meaningful life and to live your life as much as possible with bodhicitta”.
With much love and prayers...