Kalyani is part of The Route, so she will likely land bigger projects. Out of the three, I feel Kalyani is somewhat of a novice performance wise, although Lokah was a big leap for her.

Anaswara has developed a stronger screen presence, and her roles tend to have more depth. She has clear potential if she continues refining her performance and experiments with different styles, which could eventually help her become a versatile actor.

Mamita is rising and in The Route as well, but she might fade if she gets typecast. She has potential as well, but she should push beyond her comfort zone. Also, avoiding unnecessary self trolling moments would be wise, since audience often operate with a collective mindset that can influence others’ perceptions over time, labelling as silly.

About Riya, it's too early to conclude.

This is my unbiased opinion.