I was just checking how score is calculated. There are four factors involved. Population, land, techs & wonders. The only things we can do effectively this late are a bit more population and techs. I'd turn the tech slider way up and research whatever we can finish the fastest.
Also, keep an eye on Jaipur so we don't get backstabbed. I checked Toku and he has only completed one additional type of component, so he is unlikely to be a serious threat in the last 43 turns.
If we have the funds, upgrade some units to get artillery, armor, infantry and transports to prepare a last minute invasion. (Last 5-10 turns) of the game. I think we had around 14000 in the treasury. Don't forget to keep enough to knock down Jaipur first.
Switch from wealth to research to increase our research rate as we build a few farms over our cottages.