The Siddha Kunjika Stotram of the Durga Saptashati is one of the most powerful of the Hindu Stotras and chanting it with unflinching devotion is said to bestow immense benefits, spiritual as well as material to the chanter. It is also mentioned in one of the verses of the Siddha Kunjika Stotram that chanting it equals the benefits of chanting the complete Durga Saptashati.
Coming back to the Siddha Kunjika Stotram Mantra Prayog, the preferred period of performing it is said to be the period of Navratri.
The Mantra should be chanted 125,000 times using a Rudraksha Japa Mala. After this, Dashansh Havan [1/10th] should be performed.
The Mantra can be seen in the image included in the post here – Maha-Mantra from Kunjika Stotram
The Samagri mentioned below should be mixed -
Rot [thick Roti]
The Samagri should be offered to the Havan lit By Pure Deshi Ghee.
Then, lunch, clothes and Dakshina should be offered to Nine girls who have not reached the Puberty age.
This, concludes the Ti-Tisha Mantra Prayoga for Navratri. The Tantra mentions that if performed with total devotion, the fruit will be as mentioned in the opening paragraph – the dearest or innermost wish. In the Hindi language this Mantra Experiment is called as the Sampurna Manorath Pane Ka Mantra Prayog.