If one is devoted entirely to Devi and not specifically looking to solve strict material purposes, then rituals are not important at all. Bhakti and surrender to Devi is ufficient. Moreover, Karma Kanda in Kaliyuga is not effective anymore because of corruption of people performing the Puja, Corruption of Materials offered to Devi, Dilution of Rituals and many more unseen factors, thereby, the ritual remaining thoroughly defective, however sincere one may remain in undertaking the ritual for materialistic gains. On the other hand if the person does Saptashati Paath with utter Devotion alone, with one's mind soaked in devotion, the results can be far reaching.