I respectfully disagree. In my opinion Keerti has a better chance of redemption than Mansi. Keerti is being manipulated.
Mansi is just jealous that their work for free maid has married above their (Deshmukh) status. How can you redeem someone with such a jealous nature. In the episode when Sulochana locked the cupboards and refused ayi to make tea for Vijay, Mansi stood by and let her mom humiliate both Shaarda & Vijay. Earlier episodes she was shown close to Sharda. Her jealousy for Pallavi shouldnt affect her feelings for her aunt & uncle.
Agree that Keerti is reaching a new low everyday. But she has a reason to. She was wronged by D family and Pallavi didnt help her get justice and D family didnt even reprimand Sulo or Aplogize to Keerti & Jaya. Her best friend was willing to destroy her life and sent her to prison without thinking of consequence to Rao family or batting an eyelid. No wonder it was so easy for some creep (Sunny) to manupulate & use her. I think Keerti will be redeemed as some said that blood is thicker than water. Sunny putting Raghav's life in danger could be a wake up call for her. Hopefully in future if we see Pallavi giving for importance to Raos we might see their friendship retained. Remember in the beginning of the series we saw Keerti always helping Pallavi whereas Mansi only expecting things(earing gift) from Pallavi.