I'm gonna necro the heck out of this thread but hey, it might be useful for people who wanna know how to play the Tamils on the current version of DoC (latest git commit, 1.16. I said 1.81 before but that was wrong). I took some inspiration from Fresol's playthrough and decided to try my luck on Heir (Regent actually). Founded my capital on the gold just like Fresol, in addition to the Sri Lankan city on the iron. India was weak when I spawned, flipped that one barb city off them, can't remember the name. Then I conquered Visakhapatnam with my starting units (got some extra units due to India's war declaration, very convenient). I ended up founding two more cities on the subcontinent, one below the gems on the west coast and one further up that coast which has rice, double cotton and horses. Switched to Despotism and Manorialism. Tech-wise I beelined Artisanry, starting with Currency before getting the other prereq. Switched to Merchant Economy right away upon discovering Currency. Upon discovering Artisanry, I put my science slider to 0 and pushed up the culture slider as far as I could without losing money. I did this until gathering the 2000 culture, after which I turned off culture and went 100% gold. In the cities I built/whipped workboats and basic food infrastructure, interspersed with some spears to defend against marauding elephants, and the two settlers for the remaining subcontinental cities. I also built a pair of extra workers.This was followed by markets, and the capital and Visakhapatnam ran merchants. I sent the first great merchant to the Persian capital for 1800 gold. The remaining 1200 gold I produced myself. When Pagan spawned, it was empty and I captured it with an elephant. Idle, high-production cities built barracks and swordsmen for the conquest of Indonesia. As recommended by Fresol, I sent six city-raider two swordsmen (right, I switched to Conquest after trading for Generalship) and easily conquered all three of their cities, two of which were located on the mainland (razed one of them). For the third goal, I checked F8 and it turned out that I had already accumulated about 2700 gold from trade. So then it was just waiting for the second GM which I also sent to Persepolis for 1800 gold. The rest was just waiting until 1000 AD, while doing some random teching, tech trading and building any kind of building that made sense. Augustus Caesar in 1010 AD. All in all, this UHV was a breeze on Heir.
Edit: I was playing on Regent actually. I thought Regent was the first difficulty level, followed by Heir, but then realized it's the other way around.