Behind Mehar and Vrishali was the trio of Aditi Ashok, Anisha Padukone and Gursimar Badwal, each of whom shot 80.
Amandeep Drall and Millie Saroha shot 81 each, while three players, Gauri Monga, Nanaki Chadha and Vidushi Sinha scored 82 each.
Last week's winner, Gurbani Singh is not playing this week but the runner-up of Usha Southern India Ladies event, Gauri Monga managed only 82. Third last week, Aditi also struggled to an 80.
In Category A, Vrishali Sinha (78) and Millie Saroha (81) were the top two, while Aditi Ashok (80) and Sehar Atwal (84) were the top duo in Category B.
Harnemat Toor Singh (93) was the leader in Category C ahead of Arshia Mahant (94) and in Category D, Tanishka Kumar (86) was the leader. Tiya Chowdary (89) was second behind Tanishka.