Om Namasivaya Nama:
Further to various analysis I found the following STARS should be avoided as their life partner. I give below for each Ascendant (Lagna) a particular star: For example if your Lagna, ideally from female to male, you should avoide the respective adverse effect giving partner stars unless some extra ordinary benefits are spotted in both natal horoscopes. These Stars natural enemies for a particular Lagna. Therefore they are fundamentally opposite nature couples.
ASCENDENT/LAGNA - ADVERSE EFFECT PARTNER STAR
Aries/Mesha = Aslesha, Jyeshta, Revathi, Pushyam, Anuradha, Uthra Badra Padha, Apabharani, Poorvaphalghuni, Poorvashada.
Taurus/Rishabha = Punarvasu, Visakha, Poorva Badra Padha, Rohini, Hastham, Sravanam
Genimi/Mithuna = Mrugasira, Chitra, Sravishta, Krithika, Uthara Phalghuni, Uthrashaadam
Cancer/Kataka = Apabharani, Poorvaphalghuni, Poorvashada, Aslesha, Jyeshta, Revathi
Leo/Simha = Apabharani, Poorvaphalghuni, Poorvashada
Virgo/Kanya = Rohini, Hastham, Sravanam, Mrugasira, Chitra, Sravishta, Punarvasu, Visakha, Poorva Badra Padha.
Libra/Thula = Rohini, Hastham, Sravanam, Krithika, Uthara Phalghuni, Uthrashaadam, Punarvasu, Visakha, Poorva Badra Padha.
Scorpio/Vruschika = Aslesha, Jyeshta, Revathi, Pushyam, Anuradha, Uthra Badra Padha
Sagittarius/Dhanus = Aslesha, Jyeshta, Revathi, Apabharani, Poorvaphalghuni, Poorvashada, Pushyam, Anuradha, Uthra Badra Padha.
Capricorn/Makaram = Mrugasira, Chitra, Sravishta, Krithika, Uthara Phalghuni, Uthrashaadam
Aquarius/Kumbam = Uthara Phalghuni, Uthrashaadam, Mrugasira, Chitra, Sravishta
Pisces/Meenam = Pushyam, Anuradha, Uthra Badra Padha, Apabharani, Poorvaphalghuni, Poorvashada
Note: You can still marry provided lot of benefic aspects exchanged in both horoscopes. Alternatively, knowing each others weakness and shortfalls a better understanding can be achieved. However, it is difficult and rare because our natural tendencies will over throw all artificial mutual understandings. For example fire remain fire and a poison remain poinson even if you keep them in a golden vessal.