Well, my current game as Italy is going to come to a close.
Here is a breakdown on things in the game:
Difficulty is not difficult enough: Playing on Emperor was vastly too easy. Difficulty seems it needs to be up'd alot in some ways.
I am still in 2nd era. I am researching Imperialism, and have about 5 other tech's to get before 3rd era. I now get a tech every 5 or 6 turns (after going on a massive literacy building program).
My World Ranking on average is Double every other civ. I have 2244 and am Ranked #1, Closest is Mongol ranked 1603, but they cannot stand a chance. I have not built a unit in the last 60-70 turns, and when I went to war with Mongol I pumped out about 30 Cavalry in 8 turns, thus decimating their forces.
I am ranked 1 in everything except for Literacy, Life Expectancy, and Military Service.
AI tech research/Wonder building is excellent: Now, the catch is: I have not been able to complete one Wonder through the whole game. Not a single one. I am also still waaay behind in tech to most other powerful civ's. I don't see myself ever being able to complete a Wonder for the rest of the game. The weaker and smaller ones I am ahead of by a tech or 2. AI seems good tech-wise to me.
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AI builds ALOT of longbowmen (too many), they get slaughtered easily. AI also loses artillery extremely easily, and since it is offensive unit, they don't often defend them when attacking; but their slow speed and low defense makes them extremely easy targets. AI built LOTS of ships on huge Pangea map (I mean alot!).. This is always a good thing. I had some big problems with this, since I neglected my own navy (AI bombarding my coastal towns like crazy, and not much I could do about it! since my navy was so weak

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I have been solely building for most 2nd age, but if I did solely build military, no one could possibly stand a chance. And I was still strong to everyone even after I built no units for 60+ turns straight.
Weak Defenders: Defending units are WAY too weak compared to offensive units. With 2 move offensive units having a high chance of retreat, and 1 move defenders with defense usually lower than attack units, the chance of a defender actually winning a battle is extremely low.
I mean, Cavalry vs. Musketmen is so far way in the attackers favor. 15% chance Musketmen defender wins, 85% chance Cavalry offensive unit wins/retreats (That is with normal retreat odds, with them up'd as they are here, the defender more likely has under 10% chance of winning).
Even with Castle, fortifed, on hill, etc... defender win is still only around 35% or so (but with increased retreat odds, it is much lower than this; probably 25% or so). This is also way in human players favor.
Therefore, I built no Musketmen, and defended with Cavalry... because it is a fast unit also, it has
tremendously better defensive ability, even with defense 4 instead of musketmen's 5. Since other fast units cannot retreat, the normal odds of Cavalry vs. Cavalry is 24% chance defender wins (no fortified, on open ground) compared to around 10% with Musketmen. And with Castle, fortied, on hill is 60% chance win compared to around 25% with musketmen. <--- this is huge, and makes most 1 move defenders not worth building at all through era 1 and 2 (except for early spearman).
All in all, fascinating mod... I'll try a game on tougher difficulty level.
Tom