I'm a newbie to Monarch so I tried two test game starts with these GoTM03 settings yesterday.
First game: found myself on the east side of the map and soon hemmed in by other civs. Plenty of copper around (expanded to get 3), and an elephant on the NE boundary but no horses or iron which was a major disadvantage. I stopped playing this game at 660AD - glad to still be alive but not in a strong position. I expect I would have been attacked soon if I had continued.
Second game: located in the north this time and slightly better able to expand. Again, copper was not a problem and I eventually snagged an iron resource (yay!) but no horses. Again I had elephants and some good food resources but precious little in the way of happiness resources. Game stopped in 1030AD, having beaten off an initial assault from Washington. When he attacked my capital (with horsemen, cats and crossbows brought all the way up from the far south) I was a few turns away from getting the last tech needed for Samurai (they were a looooong time coming!) but eventually chop rushed a few just in time to see him off. A close shave!
My impressions, as a non-aggressive Noble level player:
1. Barbs are manageable if you are prepared: defend with archers then axemen ASAP and keep the fog of war back by posting units around your boundaries.
2. Religion is impossible to get. Adopting someone else's will most likely be required - a temple is essential if you have few luxury resources.
3. Tech trading is definitely the way to go, it's impossible to keep up otherwise. Civil Service & Machinery (for Samurai) take a LONG time to arrive but the Samurai are great units when you do get them. The research path needs to be thought through very carefully as the AI can do it so much faster on this level. Getting BW (for those all important axemen) and later Alphabet (for tech trading) are two key ones to aim for. Resources will dictate some of these early tech decisions - choose wisely!
4. It's very hard to beat the AI to wonders as well. Best not to bother if you don't have an accelerator like stone or marble (which I didn't).
5. You're unlikely to build more than 5 or 6 cities on this type of map before you're hemmed in so make the most of position.
6. You're forced into chopping just to keep your head above water.
These games are very grim for someone like me and I have to say I didn't particularly enjoy these initial trial games. It's not much fun when the odds are so unfairly stacked against you. I've proved to myself that I can stay alive but don't feel at all optimistic about doing much more than that, let alone get myself into a winning position. It's a struggle just to have enough defensive units, building a viable
offensive force seems to be a very difficult goal, even with Tokugawa.
Having said that, I do still think I have learned a few valuable lessons from these games so it's not all negative.