What are the conditions if present in a chart, makes chandra Kundali more important than lagna kundali.

What are Jamini rules to decide whether ketu and rahu are ruling scorpio and aquarius respectively or mars or Saturn in a horoscope. This was mentioned in the last livestream but not in detail. Curious to know.

Kehte hain ki Rahu Aquarius ko Saturn k saath co rule krta hai, aur ketu scorpio ko mars k saath. To agar mars Aquarius me ho, aur Rahu Aries me, ya fir agr Saturn scorpio me ho aur ketu Capricorn me to parivartana yog maana jaega? Assuming ki Rahu ke case me Saturn ki condition achi ho aur ketu ke case me mars ki condition achi ho (achi mtlb exalted/ownsign/friendly sign)

Agar neech grah ka sign lord OR jahn pe vo neech grah uch ka hota hai, us rashi ka sign lord CHANDRA kundli se Ke me ho to neechbhang hoga? For example- agr venus deblitated ho sun k saath virgo me, aur moon-mercury-jupiter leo me conjuction me ho, to neechbhang hoga?