I have played eight or nine games on Deity and have been winning consistently. However, I just recently lost my first Deity game on a large map. In the past I always play on a normal map. So perhaps I can get some tips on winning on a large map.
In my normal map games, I always try to expand my civ as much as I can, and only engage in battles if an enemy civ is blocking my expansion. I will focus a lot on science and will also have two to three wonder cities. I try to change to democracy a.s.a.p. Now I even skip the communism stage. I'd go Monarchy-Republic-Democracy, sometimes even Monarch-Democracy. I use the We Love The King Day strategy to boost my population too. Also, I have babarian activity on Raging Hordes. Usually in my experience on Deity, by the time I reach the modern age I'll be far ahead in science and civ size and I'll be able to launch a space ship before the rest (or launch a faster one to catch up with anyone else who launched earlier than me). Sometimes if I'm too far ahead I just use howitzers to take over the world.
Now, in my recent Deity game on a large map, I've missed ALL the early wonders (usually I still get to build a few, like Great Wall). My civ grew to be the largest, and most advanced, but the others are all very close behind because all 6 of them teamed up against me (as usual) and keep exchanging techs. Two other civs were almost as large as me. I have occupied almost all of my very large continent, but have not invaded the other (many) smaller continents of the AIs. Actually I really really seldom build ships, except the early ones to explore & populate other nearby islands. And then some guy built the Manhattan project.
I really hate nukes in my civ games and always try to avoid them. I got nuked a few times and basically lost one of my 4 city islands (not my main continent). And I got beaten by one of the larger AI civs in building and launching a spaceship. They were all too close to me / at the same level as me in science.
So, any suggestions on how to win on Deity on a large map? Should I be more agressive militarily? Should I have expanded even more. In my game I have very few ships and have only expanded to two or three other islands (well, partly because my main continent is very large).
In my normal map games, I always try to expand my civ as much as I can, and only engage in battles if an enemy civ is blocking my expansion. I will focus a lot on science and will also have two to three wonder cities. I try to change to democracy a.s.a.p. Now I even skip the communism stage. I'd go Monarchy-Republic-Democracy, sometimes even Monarch-Democracy. I use the We Love The King Day strategy to boost my population too. Also, I have babarian activity on Raging Hordes. Usually in my experience on Deity, by the time I reach the modern age I'll be far ahead in science and civ size and I'll be able to launch a space ship before the rest (or launch a faster one to catch up with anyone else who launched earlier than me). Sometimes if I'm too far ahead I just use howitzers to take over the world.
Now, in my recent Deity game on a large map, I've missed ALL the early wonders (usually I still get to build a few, like Great Wall). My civ grew to be the largest, and most advanced, but the others are all very close behind because all 6 of them teamed up against me (as usual) and keep exchanging techs. Two other civs were almost as large as me. I have occupied almost all of my very large continent, but have not invaded the other (many) smaller continents of the AIs. Actually I really really seldom build ships, except the early ones to explore & populate other nearby islands. And then some guy built the Manhattan project.

So, any suggestions on how to win on Deity on a large map? Should I be more agressive militarily? Should I have expanded even more. In my game I have very few ships and have only expanded to two or three other islands (well, partly because my main continent is very large).