Vaishnava Samhita: Mahaprabhu Ramananda Samvadam.
Vol II Book 4 Chp 8 Shloka 44
नामसन्कीर्तनादन्यत्साधानं नैव विद्यते
धर्मार्थकाममोक्षाणां लाभाय च कलौ युगे
Naama Sankeertanaad Aanyat Saadhanam Naiva Vidyate
Dharma Artha Kaama Mokshaanaam Laabhaaya Cha Kalau Yuge
I am not able to find any way other than the repeated chanting of the Divine Names to gain the purushartas of dharma, artha, kama and moksha in this age of Kali
Please check these: Excerpts from a discourse by our Sri Sri Muralidhara Swamiji