The guru yoga in Tibetan practice is similar to the guru mandala in Newa Vajrayana, but focusses completely on a particular teacher who embodies Vajrasattva. The Newa ritual lays out the four mandalas: Buddha, Dharma, Sangha, and Guru.

Transcriptions of many Sanskrit Buddhist texts were made through a heroic effort that combined the resources of the Lotus Research Centre in Lalitpur, Newa and Japanese scholars and funders, the Nāgārjuna Research Centre, and the University of the West in Los Angeles. For example, you can find the [Perfection of Wisdom texts](https://www.dsbcproject.org/canon-text/browse-by-list/77) there, including both sūtras and sastras.

From the Culavagga, Snp 2.13, on the right way to be a wandering ascetic:

https://suttacentral.net/snp2.13/en/sujato

Compare this to the 37 Practices of All the Bodhisattvas, by Gyalse Tokme Zangpo:

lotsawahouse.org/tibetan-mas...

Across all transmissions of the Buddhadharma, the virtues of one who takes up the homeless path are well understood.