Astrology is one of the toughest sciences as,
n number of contradicting rules have to be weighed and judged to come to right conclusions.
First thing that we study in a horoscope is longevity.
If ascending sign, it's lord, the planet occupying it,
8th house, its lord and whoever aspects it, are all positive
we come to a conclusion that there is full potential for a full life.
Malefic planets in 3, 6 and 11, increase the strength of life.
So does yogas like Panchamahapurushas.
A very misunderstood concept is the positivity of houses like 6th.
Classical texts say that Saturn likes 6th house.
It promotes Saturn and results of saturn.
But it makes the 6th house very difficult.
Saturn in 6th house gives victory over vile enemies, but then it's frustrating to have those enemies!
So what good does Saturn in 6th do?
It gives material success through persistence.
It gives endurance.
It makes one elastic.
It makes one almost a glutton.
It gives one a sturdy long life too.
One of the most important rules of astrology is that the lord of the house is more important than the planet occupying the house. So, the dispositor of 6th house saturn is of critical relevance.
So is the case of aspects and other relationships.
Imagine the case of saturn going into simha/leo for meena lagna.
as sani is in satru/enemy house, ie of sun, it will become a first rate difficult planet, provided sun is also afflicted.
suppose a person with pushya/anuradha/uttarabhadra star has the above combination, as saturn dasa will be his first dasa, that particular period will be very difficult.
Suppose, sun and moon gets weak and jupiter not providing enough support, length of life will be surely affected.
when the basic issue of ayanamsa itself has not been satisfactorily solved, it is highly illogical to calculate still finer stuff like mrtyu sphuta and judge death based on it.
if the basic rules are sensibly applied there will be better results.