Deshmukhs were kicked out of Varsha's engagement because of Ajit and of all people Rasika is reminding Savita about that incident and about the condition Savita had put before Archu and asking her to kick out Archu! Didn't Rasika anticipate that Savita could ask her that Karanjkars had honored Lokhandes on Varsha's engagement then why is Rasika is asking Savita to take revenge from Karanjkars for that incident? Usually Rasika is shrewd and takes care of little details.
If Archana is out of Deshmukh's house then she'll be back at Karanjkars. Manju already has problem with Archu living in same house with her, Manju wouldn't like that Archana has come back to stay with Karanjkars. So by giving this suggestion Rasika has created a situation that Manju wouldn't like. And as the precap was shown, how didn't she anticipate that Varsha can still come after her . Did all of this make any sense😕?
More of nonsensical development in the story can proceed like this- now that Archana goes back to live with Karanjkars, Manju will get piqued and she could go back to Lokhande's house and Rasika in order to have leverage over Archana will send Vandu back to Deshmukhs. And what will happen after that is as good as everyones guess....