I have just published a new, free booklet of ancient and medieval Indian army lists for TtS!, named Across the Indus! It covers the Indian sub-continent and the Hindu Kush up to c. 500 CE, including the Classical Indian list, Kushites, and the Bactrian Greeks. You can download it from here.
There are now over 200 free army lists for To the Strongest! You can find the list you want by downloading the Index of lists here!