Just finished India on monarch. Basically, it starts like a normal UHV attempt except that you don't build any settlers. Settled Lahore on the sugar. Researched masonry, poly, mono, meditation, priesthood, writing, got theology from the Oracle, then built 4 temples and hired priests while researching and trading for basic worker techs and monarchy. After that, went for calendar and construction (should've done that in the other order for this one, though; war elephants are more important). Civics: HR, OR while building infrastructure followed by theocracy when building my war elephants, serfdom after trading for feudalism, and bureaucracy after CS came in. Once I had 8 war elephants, I started marching them toward China. I was able to raze 2 cities but lost most of my force trying for a third and made peace. It was enough, though: when 1200 rolled around, I had about 2.3 million people (one size 16 city) compared to China's 2 million, and Greece (my other competitor for population) collapsed in 1150. To get the city to that size, I built a granary and aqueduct and traded for every health resource I could--the AI sells most resources for 6 gpt, and I had an extra wheat as well as a dye that I didn't need. Also, I had a little luck early on when I got +2 health from a random event.
Screenshots below.
Screenshots below.
Spoiler :