I'm glad you're finding this thread useful! Sounds like you've set up a good empire with your city specialization -- a great habit to learn.
Obsoleting Stonehenge will mean any new cities you capture or found will no longer get a free Obelisk. You'll also be unable to build Obelisks in any cities. Feel free to obsolete it when you have other means to produce culture in your cities and it sounds like you're already there if you have religions. The great people points you get from Stonehenge will continue to accumulate as well as the culture it produces. I'm not certain about any existing obelisks you already have because of Stonehenge.
You can do the same analysis for any obsoleting technology. Weigh the benefits against the negatives, considering alternative ways of getting the benefit.
There are certain wonders and civics (don't have my reference handy) that give you additional Science or Culture from religious buildings if you have that religion as your state religion. Be sure to build monastaries for your founded religions before they become obsolete by Scientific Method.
As usual, there is no always-correct-answer. The one thing all those cities require is sufficient food to work the desired tiles. For example, a city with 10 mined dessert hills (4
each) is sub-optimal without enough food to work all of them. In that example, you could also build workshops on any grassland tiles or watermills on rivers as long as you have enough food to still work all the mines. If not, farm the grasslands instead.
Never put a single unit adjacent to an enemy city unless you want to sacrifice it to draw the enemy out in the open (heh, I've been known to bring along an extra worker or two with an invasion force just for that purpose). It's better to stack your force in combined arms teams; offensive foot soldiers, mobile units, and anti-counter-attack units (Pikemen, Gunships) for force protection. If you want to disrupt the enemy's road network or resources, then form smaller, combined-arms teams just for that purpose. For example, a Spearman/Axeman/Horse Archer team can pillage a resource and its road in two consecutive moves (HA pillages the resource on first turn as the stack moves onto the tile, and the road on the second turn as the stack leaves the tile). The team can survive in enemy territory but again, don't park them adjacent to a city.
It usually takes a combination of buildings (wonders), great artists, producing culture in your build queue and the culture slider. There are some good forumlas to follow in the Strategy Articles forum.
You're welcome. That's why we read this thread!
1. Researching techs - do I need to research every tech in the game? After founding Hinduism, I decided to leave many of the other religion based techs alone. Will there come a point where I have to research them (in order to evolve)? How long should I wait on a tech that obsoletes a wonder? Last night I chop rushed Stonehenge very early, so I waited forever on the calendar tech (in order to not obsolete the wonder. Did I need to do this? What impact will researching the obsoleting tech have?
Obsoleting Stonehenge will mean any new cities you capture or found will no longer get a free Obelisk. You'll also be unable to build Obelisks in any cities. Feel free to obsolete it when you have other means to produce culture in your cities and it sounds like you're already there if you have religions. The great people points you get from Stonehenge will continue to accumulate as well as the culture it produces. I'm not certain about any existing obelisks you already have because of Stonehenge.
You can do the same analysis for any obsoleting technology. Weigh the benefits against the negatives, considering alternative ways of getting the benefit.
2. Religions - what is the best way to maximize a founded religion? What buildings do I need? I founded Hinduism, built a temple and monastery in the founding city, have it as my state religion and spread it throughout my cities. I also used a GP to build the Hindu holy temple (???) in the founding city. Do I need a temple in every city? What else do I need to do to reap the benefits of religion?
There are certain wonders and civics (don't have my reference handy) that give you additional Science or Culture from religious buildings if you have that religion as your state religion. Be sure to build monastaries for your founded religions before they become obsolete by Scientific Method.
3. Specialized Cities - what resources are best utilized for a unit building city (hammers)? for a commerce city (cottages)? GP generator (food)? Do I need to add other resources to the specialized cities? For example: in a unit producing city, do I need food and commerce or should I maximize hammers (choosing a watermill +1H instead of a farm +1F)? What building are best for each type of city?
As usual, there is no always-correct-answer. The one thing all those cities require is sufficient food to work the desired tiles. For example, a city with 10 mined dessert hills (4

4. Stacking - is it better to make war with stacks or to surround your enemy? If I have 6 units attacking a city, should I stack them or should I occupy every tile around the city? Is there a way to group the units so they always move together?
Never put a single unit adjacent to an enemy city unless you want to sacrifice it to draw the enemy out in the open (heh, I've been known to bring along an extra worker or two with an invasion force just for that purpose). It's better to stack your force in combined arms teams; offensive foot soldiers, mobile units, and anti-counter-attack units (Pikemen, Gunships) for force protection. If you want to disrupt the enemy's road network or resources, then form smaller, combined-arms teams just for that purpose. For example, a Spearman/Axeman/Horse Archer team can pillage a resource and its road in two consecutive moves (HA pillages the resource on first turn as the stack moves onto the tile, and the road on the second turn as the stack leaves the tile). The team can survive in enemy territory but again, don't park them adjacent to a city.
5. Legendary cities - I need help in building my cities up to legendary. What is the basic plan to creating legendary cities - population count? specialists? great people? wonders? I noticed that in the same number of turns my civ with all 7 religions grew my three main cities much bigger in overall score than the three cities in last night's game where I focused more on building military units. Obviously there are other things I need to do to improve those cities scores.
It usually takes a combination of buildings (wonders), great artists, producing culture in your build queue and the culture slider. There are some good forumlas to follow in the Strategy Articles forum.
Thanks in advance for all your help.
You're welcome. That's why we read this thread!