1. Gifted technologies that can't be researched, like Seafaring. Civ-defining uniques.
2. Primitive starting technologies.
I switched Hunting with Exploration, because even animals are able to hunt stuff, while codified exploration requires some purpose and sanity. It is harder to build a road than it is to trap some rabbit. Also, another group of food resources is available from start.
Crafting
Agriculture
Fishing
Hunting
Ancient Chants
Also I propose to enable building hunting camps on any type of wildlife. Hunt for pigs? Hell yes. Horse hamburgers? Why not. It works worse than pasturing them, but it is technologically cheaper. And worker can convert camp to pasture, which should be cheaper than building pasture for scratch.
3. First advancements.
The game is still in early exploration phase, and player probably is still not sure about future of his nation. Thus, no branching yet.
Mining
Masonry
Calendar
Animal Husbandry
Fishing
Roads (ex-Exploration)
Education
Mysticism
4. Choices and consequences.
Lots of technologies here. Basically this is glorified Bronze Age (of course, top slot is "Bronze Working"). Or "Classical Age", no matter. Ends at Iron.
Now, Education leads to Reason, while Mysticism leads to Belief. These two technologies are mutually exclusive, which means that you can't have both in the same game. Maybe there could be a wonder (national or world) which allows you to convert Reason to Belief and vice-versa, changing global paradigm of your nation.
If you got Reason, then you lose access to arcane magic (loose term, it probably requires to be rebuilt anyway), yet still have full access to divine magic in form of religion-based units. Basically whole branch of technologies like Sorcery, Arcane Lore et cetera goes red. Note that for most part these are end-game technologies. You still have possibility to train mages and shoot flame from their fingertips, but you will never have any ultra-epic magical awesomeness.
If you got Belief, then you lose access to Scientific Method and all it's goodies. No Electricity (it is rude to command spirits of thunder like that, anyway), no Biology (bacteria? We don't need no stinking bacteria, pray Octopus Overlords and let the dark blood flow) and anything more "modern". Railroads and zeppelins are fine, portable automatical weapons (lighter than machinegun) are not.
It is pretty obvious that we have to "buff" magical stuff to bring it in line with technological. Techs have battleships? No problem, we mages have spells which command the water (tsunami), can control Leviathan (who should be strongest naval unit ever) and, well, still have steam-propelled dreadnoughts. Airplanes? Portals. Giant humanoid mechs? Uh, demons. Spaceships? More portals. Nukes? Magical nukes, and more portals.
Majority of religions are selectable somewhere here.
5. Steps on your way.
Beginning at Iron Age and continuing to Middle Ages. Most of technologies here are available for both paths, but Reason guys have less problems with researching stuff like Optics, Metal Casing and Machinery, while Believers got substantional bonuses to techs like Knowledge of Ether, Philosophy and Way of the Wicked.
Yes, both "sides" have access to Fire Mages and Trebuchets. And this age ends somewhere near gunpowder: cheap and effective way to kill your adversaries.
6. Renaissance of something.
Up to industrial (or "magical", needs better name) revolution. Frigates, Cavalry and Liberalism. Mercantilism, Righteousness and Mithril Working. FFH techtree ends here, and we will have to continue it quite a bit.
And here we again do have mutually exclusive technologies. Reason guys gain "Genius" and "Brilliance", Belief folks have "Balance" and "Transcendence". You can have only one.
Genius brings us to the world of mundane (yet still awesome) technology. No mages. No unicorns. Still can have rainbows, but only as optical effect. Can build spaceships and giant robots, but lose all powers of magic. Divine-based stuff converts to usual mundane religions, without growing Ancient Forests. Your magical-based units gain "promotion" that have 20% chance to disband them each turn. Goodbye, cruel world (and enter the lazors!!1) Of course, you can't build magical-related stuff, it is obsolete.
Brilliance — fringe dream of Nicola Tesla. Spellcasting? Of course. Totally scientific. You can't have Robotics and Fusion Power, no giant robots and space stations for you, but you can build titanic lightning-throwing towers and armored airships, how cool is that? In this world of brilliance, religion still weakens a bit after a while (probably in Industrial or Modern age), but it's okay, because now we can mass-produce plasma guns, freezing cannons and fireball grenades.
Balance is similar to Brilliance, but more magical. Followers of Balance paradigm strive to live in utopian world, where magic serves all human needs, and technology helps where it is convienent. No dragons, they are too extreme. No "large stuff" at all, that's just not their style. But they do have most powerful archmages, who can destroy these vulgar machines with twitch of fingers. Instead of plasma guns, Balance provides us with lightsabers and Staves of Nuclear Power.
Transcendence — oh boy. All hell (and heaven, and ether, and madness) broke loose here. For example, "let's all transform ourselves to magical beings who need no food whatsoever" as a world wonder. And even "let's build Pyramid of Retribution, which allows us to open portals anywhere in the world to spit raging fire of hell (or heaven) upon the heads of out enemies" as national wonder. I think that we need some drug-users to design this path of enlightenment. Dragons? Sure, we have a farm. Demons? Kids are learning how to summon and bind them at schools. Immortal Exalted Champions of Light? Sure thing, this is our answer to Navy Seals. They still carry swords and halberds, because they can. And we don't need no stinking technological stuff here. Any self-respecting mage will conjure something mysterious to do his bidding instead of building machine to do it. Lots of obsolete stuff, "tech" units gain a promotion to disband themselves (just as magical do in Genius' case), because no one cares anymore.
7+. Industrial/magical age, Modern age, Future age.
I think that most points already been said in "Renaissance" chapter. Religion weakens everywhere but in Balance civilizations, because both techs and transcendence weirdos are way too cynical to worship anyone, including themselves.
"Technological" victory is probably different for anyone. Genius guys still build starship and send it away from this hellhole. Brilliance... I have no idea. Balanced prefer Altar of Luonnotar and/or Tower of Mastery, and Transcended just convert themselves to gods or something.
You can see that civilizations lose a lot when they step on Transcendent or Genius paths, because Balance and Brilliance don't come with "auto-disband" promotions. Yup, it is hard, bite the bullet. Or don't, your choice. "Extreme" paths probably have more awesome stuff in the end to make these choices sought. Or not.
