Hello Rhye, long time. Sorry for my answer is late, didn't have time to play again. Actually, it's also you fault, for not letting us test new versions of your mod

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1. Viking missions:
Raiders - points for every pillaged improvent, additoinal point for every captured worker or settler, plunderd caravan or born greate general.
Colonizers - points for every city, captured or founded outside Scandinavia on Atlantic, Baltic, Meditteranian or Black sea cost. Additional point for every city in England and America. Additional points for beeing first, who found a city in America.
Traders - for every trade route, sent to a city in Asia, Constantinople includet. (I don't know, how long are trade routs in your game now, so may be you can make a time limit here, so it wouldn't be too easy to achive it in late game). Points for every turn beeng first in traded goods in demografics. (when your check demografics tab, you can see which player is first in solders, litracy, manufactured goods and so on). Additional points for every great merchant.
2. Japan missions:
Bushido: points, for every turn, player is first in culture, or/and in faith or/and in demografics in solders. Additional points for every great prophet or great general.
Greater East Asia Co-Prosperity Sphere: points for every city, controled in East Asia outside Japan, on a pacific island, in Australia, India or in America.
Economic wonder: for every turn, beeng first in demografics in litracy and manufactured goods. Additional point for every great scientist or great engineer.
3. England missions:
Sun never sets: for every city, found outside Europe. Additional points for controlling a city in India, Suets and Panama canals. Aditional points for every great admiral.
Factory of the world: for every turn, beeng first in demograics in traded goods and manufactured goods. Additional points for every great trader or great engineer.
Motherland of Newton: additional points for every technology, discovered first and for every great scientist.
Actually, if player would achive those goals, he will win anyway.
Tell me, is it helpful? I can do more.
Also, if you don't mind, a couple of suggestions:
1. Rocky mountains are too rocky. The only way from California to the East Coast is in Canada or in Mexico. Also, there are a couple of tiles, workers cann't reach becouse of mountains, espeсially coal tile in Canada. And settlers cann't travel there anyway becouse of the desert. And it would be nice to have a northen passage through Himalayan from Afganistan, where Alexander came to India.
2. Could you change places of some tecnologies? I find it stupid, when I get atomic bomb before buttleships and carriers. Could you move Electronics to the place of Radar, Radar move to the place of Nuclear Fisics, and Nuclerar Fisics move where Electronics is now, please, if it's not too hard.
3. It would be realy nice to have more religious belives. Firaxis made just a few realy usefull belives. It's not a problem on a small map, when everyone appears at the same time, you just compet for religious bonuses. But, in your mod, when early civs pick all the usefull belives, it makes no sense to found a religion for a late civ. But AI still founds useless religions. May be you could just duplicate all belives, and duplicate religious buildings several times, and we will find new names for them? That could be the easiest way to fix the religions problem.
4. Could you make a canal improvement?
Just like in this mod, only script their appearances in Suets, Panama and Bosphorus, becouse AI may not build them. This improvement could also give gold.
5. Would it be possible, to give a scientific bonus for having few cities, so small civs could catch up the big one? You can do it with trade routs. Now, when you send a caravan to a city of another civ, you get a scientific bonus, if that civ is ahead of you in science. Just multiply that bonus by 20? and divide it by a civs cities number or civs population number. And than multiply it by 2 or 4 during the golden age, to simulate a time of fast modernization, that happend in Japan or Russion history, like Meiji restoration. Becouse sometimes it's just boring to play, when big civs are going much further, than small. Remember, in Civ IV that was fixed by a penalty for having many cities, so small cives were sometimes far more advance, than big?
6. Could you please remove combat penalty for strategic resourse shortages for units? It gives you 50% combat penalty, when you use more strategic resourses, than have. I think, barbarians don't get this penalty. This makes new civs very weak, becouse they swordsmen and horsmen can't fight properly, while they are improving their strategic resourses. It also makes useless strategic resourses trade. Imagine, you bought some iron from your neighbour, made some swordsmen, and then your neighbour declares war on you, and you swordsmen worth nothing. It also weakens small cives, that don't have much strategic resourses, so they cann't fight with big one.
7. And I also been thinking about rivers as a roads. May be it make sence to make a hidden free-maintenance road on a tiles with river? With no bridges, of course, if its possible. Or only on one side of a river. Becouse, in Russia, for example, in some Siberian places only road you can use is still just a river.
8. Would it be possible to force European AI to colonize the New World? Sometimes, they just don't. May be you will give them some Liberty policies on start, so they would more willingly build settlers?
Sorry, for beeing such bothersome, eager to see your new mod.
Thank you.