Dromton's teacher was the disciple of a man who was one of how many Buddhist Mahasiddhas?
Ratnākaraśānti: Ratnākaraśānti (also known as Śāntipa) (c. 1000 CE) was one of the eighty-four Buddhist Mahāsiddhas and the chief debate-master at the monastic university of Vikramashila.
i don't know