thank you for your query…it depends on how saturn or the atma karaka is placed…I have saturn as atmakaraka too…the soul purpose of our life and birth..however it is in exalted position in Libra…as saturn is very ethical in nature and demands hard work …native should be ready to do seva and would have an inclination to serve the particular significator of house and zodiac it is placed in so for example if Saturn sits in 2nd house so very helpful in family if in 10th house very helpful in job or towards father if in 6th house very helpful or uplifting towards society and needy…once native starts working for saturn as per placement native starts feeling a sense of satisfaction and contentment in life…now about conjunction you mentioned above it also depends what role mercury is playing? is it darakaraka or pitrikaraka etc along with rahu this combination with show some pending karma but check the nakshatra to analse what is playing out and how life lessons are manifesting…it will also tell what the pending karma is bcoz saturn and rahu n ketu together show pending karma for that house and significator….jai mahadev maa gauri