Mahayoga or Parivartana Yoga?

Hi @ernst & all - For a Libra lagna w/ a interchange between the mars (2nd & 7th) and mercury (9th & 12th) owned rasis, does this form a mahayoga or parivartana? I know you shared in the videos that for these yogas not to consider the bhava cusps but rather the rasis themselves. The specific planets Ma is in 12th and Me is in the 2nd. 

The experiences feel like that this might have some mahayogas of w/ the 9th and 2nd interchange since there is steady progress and fulfilment in majority aspects of life, as opposed to, a misery yoga. It gets interesting when these form in dual signs. 

Thanks!