The daily meditation upon one’s desired spiritual body i.e. siddha-deha or siddha svarupa is an ancient practice of sadhana originating in the Puranas.
Manjari svarupa meditation and asta-kaliya-lila smarana are not “concoctions” “newly invented practices” or the kalpana of some Radha-kunda babajis.
These two sadhanas are described in the Padma Purana, one of India’s oldest and most authentic scriptures. What follows is Lord Shiva’s answer to Narada Muni’s inquiry about how to practice raganuga sadhana bhakti.
“Shivaji said, ‘O Naradaji, once I met Sri Krishna in Vrindavana and Bhagavan taught me about Radha and how to attain Her eternal seva. At that time, Sri Krishna said, “’O Rudra, one who takes shelter of us (Radha-Krishna) or only My beloved Radhika and serves Radharani with unswerving devotion, he/she WILL COME TO ME!”’
Then Krishnaji said, “O Shiva, you should clearly know that My beloved Radhika is a great ista-devata, surrounded by hundreds and thousands of Her dearest girlfriends, the sakhis. My cows, gopas, gopis and this Vrindavana exist eternally. My Vrindavana is the place of unlimited bliss, so it is called “Ananda-kanda”. If one merely enters Vrajabhumi, they will never take rebirth again. Like Me, Shivaji, you should always live in My Vraja!”
Narada replied, “O glorious Mahadeva, I am glad to hear this. Now please tell me how to practice raganuga sadhana.” (Padma Purana, patalakhanda cp. 82.73-88) More in part two. Ananda kanda Bhagavan Sri Krishna ki jai! Ananda Vrindavana ki jai! Jaya Jaya Sri Radhe!