Yes, I also learned that He is a combined incarnation of Lalita devi and Srimati Radharani.
Godseedji, have you read this in Gaura Gannodesh Dipika, that He was also an incarnation of Vishaka devi? I am interested to know, because I am so ignorant. I know many times even 3-4 residents of Goloka incarnated as one person.