At this point it seems we can be fairly certain that the airplane started striking trees about a mile from the threshold, at an altitude somewhere around 300 feet or more below MDA, 150 feet or more below the PAPI, and at least 100 feet above airport TDZE.
So the question becomes "how did they arrive at that point, that far below the MDA and that far below the commissioned slope of the PAPI?"
Not to disparage anyone's efforts, but trying to refine those numbers any more precisely doesn't seem to change the overall scenario.