Answer
Sage Parashara emphasizes Shastiamsha or D-60 as the most important chart, he said that look into Shastiamsa for "all matters".
Shastiamsha and timing of the results of yogas is done using Mooladasa.
Shastiamsha or D-60 is also referred for Past life birth and events in that. This gives an understanding of the good karma, that a person would enjoy and suffer for the bad ones. That is what Sage Parashara refers for “all matters”.
60 years is a full cycle of vedic calendar. When all the zodiac is divided by 60, then total 7200 parts is got.
Surya Siddhanta talks about a Maha Yuga[1] of time, which has 600 parts of 7200 years amounting to 4320000 years for a Maha Yuga.