Some ideas.
- Monastery can heal friendly units and convert opponent units, just like a monk.
- Monks regain Faith faster by 20%.
- Blacksmith and its armor upgrade techs are available one age earlier than other civs.
- Dock provides 5 population.
- Careening and Dry Dock are free.
- Market provides 10 population.
- Buying resources do not need commodity trading fee.
- Selling resources do not need commodity trading fee.
- Non-military units (Villagers, Fishing Ships and trade units), Monks and Scout Cavalry line use 0.5 pop, but the max pop cap -20%.
- Each TC and Castle spawns 1 Villager once hitting a new age.
- UTs and Conscription are researchable at TC but research time +150%.
- Berry Bushes contain +100% food.
- Huntable animals contain +50% food.
- A Farm can be gathered by 2 Farmers.
- Farms +100% HP, and hinder movements of enemy troops if Farmers are working on there.
- Trees contain +50% wood.
- Foragers and Shepherds can drop-off the food directly.
- Hunters and Fishermen can drop-off the food directly, but work -10%.
- Lumberjacks can drop-off the wood directly within 3 tiles from Lumber Camp, but work -8%.
- Gold Miners can drop-off the gold directly within 3 tiles from Mining Camp, but work -8%.
- Stone Miners can drop-off the stone directly within 3 tiles from Mining Camp, but work -8%.
- Repairing cost -33%.