I am going to weigh back in on this discussion and see if we can converge on what we think is the toughest answer.
This game is with Japan on a tiny Map.
Japan is Religious
and Militaristic.
Half price Barracks and Temples are immediately available to every town so you can start building Vet military within 30 turns or the start of the game OR you can start pumping out culture.
A big limiting factor on this map is the tiny map size and how it effects the optimal number of cities. With nOpt set to 12 and the map size tech rate set down to 160 (versus 16 and 240 on a standard map) the scientific research rate will be maxed out at somewhere between 18 and 20 cities compared to 24 to 30 cities on a standard map.
Another big factor is that the nOpt number cripples the AI players when they get near that city number. The AIs will never build or keep captured cities over the nOpt number unless there is a key wonder at stake.
I think its pretty clear that the domination and conquest victories are the quick and easy choices for this map. It would easily be possible to win these victories with researching, trading, or exorting only Bronze-Iron-Alphabet-Writing-Mapmaking-WarriorCode-HorsebackRiding. Only 7 techs that you don't have at the start and to make matters easier China and France will have two of these to "donate to your cause."
Early Domination will probably be tougher than early conquest in this case because you have to build or capture enough towns to get at least 2/3rds of the landmass and population. The counterargument is that some people will fall into domination by accident because the AI players will be severly handicapped by the optimal cities number. With no civs starting on the two intermediate islands, the terrain squares on the home continent plus these two landmasses exceeds the domination limit
The culture victories are a cake walk in this game because the early temples double in culture value after 1000 years. Lack of luxuries on this map will force you to build cheap cathedrals in every city and to go for the Sistine Chapel. You could turn off all scientific research after Education and just hit click and return while you playe with your weapons and hack at the barbarians and let your culture grow to 100,000 points. Japan is the only religious civ on this map so the deck stacked in our favor for culture out of the box.
20,000 culture in one city is tougher because you have to focus all the wonders and improvements in one city. Lots of unit building in other cities and then shift them to this city to disband and rush any improvement in one turn so you can keep all the other turns assigned to building wonders. Build cities on the frontier and give them to your last remaining vassal until you get them up to 8 or 10 cities and then attack the vassal with elite units to farm great leaders and rush wonders in this one main city.
I think space shuttle is tough on this map (although eventually you will get there) because the tech rate and city count is so crappy. You have to keep your enemies alive AND productive in order to get to the space shuttle techs quickly.
Diplomatic is really tough because the first two civs will have to die without angering the other two (or three). The civs are crammed together in two groups of three so conflict is almost guaranteed. It will be hard to be friends with all of them at the same time when they will be mindlessly trying to kill each other. You can't win a diplomatic victory when there are only two civs remaining and the three stooges on the other continent (Otto, Sleezer, and Jerkses) will be trying to kill each other off so "there can be only one"
Otto gets the crappiest start position sympathy award but our location for Kyoto runs a close second.
If I were the great GOTM control god in the sky, I would have editted in big pile of land south and east of the stooges and would have relocated Otto down there connected back to Larry and Moe via a land bridge. At least that way we would have had some competition on this map.