Well you are right in that there were a lot of other tricks in the bag so to speak during the game that I just didn't have time to put in the walkthrough. I think my writeup was already something like 25 pages!!!! And it took me many more hours to get that far than I had planned!
And yes, never trade key techs unless you have an emergency situation. E.G. No matter how much it may hurt, don't trade vital liberalism techs!!!! Not unless you plan to bi-pass liberalism, then in that case who cares.
After liberalism I'll go crazy, but I still won't trade things like Military Tradition right away. Also, when hitting electricity, etc... DON'T trade techs up this media branch until you are on your FINAL turn before completing the wonders. You don't want someone with a GE to rushbuild a wonder on you, and yes they will do that!
And again, it's fine to trade literature pre-liberalism, but only WHEN ON THE LAST TURN OF COMPLETING THE GREAT LIBRARY. Etc... Etc.
Exceptions... when you're sure the AI doesn't have forges, GW, Pyr, or HG to get GPPs for engineers very early... then you can make some changes there. Obviously the harder the level, the much faster the AI will pop out those GEs on you.
This is another reason I like the GW and Pyr, that's two more methods the AI is prevented from GEs. And of course oracle also slows them down in MANY aspects very huge early.
They can't get alphabet early, they can't do metal casing slingshots, etc, etc. they can't even use the gpps from it to lightbulb
Now they also can't grab CoL cheap, which is one they don't beeline for, and hampers their liber-race.
As for internet, i always grab it whether I find it useful to me or not, at least to prevent anyone else from catching free rides.
In this game, I was a little short on specialists. Also we were forced to run under US, which prevents Rep at the end. Also with our smaller size, I figured it much superior to totaly shut down all science spending again, and use the Internet to stay running at the top. How much did all that gold help Nappy? Good question, I'm STILL not sure what he even did with it, but trade-menus show that he didn't have 40K for long. He ended up never showing more than 500 for some weird reason.
O_o
I think I also got Qui (a very happy tech trader) to refuse trades with Hauyna. And IIRC, he really took a rapid tech fall after that.
I'm not sure anymore what my exact relation was with Nappy when I had my cavalry army. But I did a lot to keep increasing the modifiers throughout the game. A few times I was FORCED to switch to FR just to trade with his vassal. This was enough to get nappy to refuse trade with me. I had no choice though, as I had to trade to backfill and get other key techs to re-bribe nappy, etc.
There was about 5-turn cool-down wait periods before I could switch civics again, where i'd go back into the same religion as Nappy, and he'd re-open his trade and move back into pleased from cautious.
The one nice thing about Nappy when you're running a heavily based SE system, is Rep is nappy's favourite civic. So you can count those as free bonus modifiers right off the bat.
I demanded a tech early from both Nappy and Mansa, I really shouldn't have bothered I guess. That's' just taking a long shot, and getting an extra -1 around to haunt you.
In fact, later on near the end, when I kept getting caught trying to sabotage a stupid aluminum hill (god my spies were awful), nappy shut down trade which really sucked, because he had my only source of coal. A couple rounds later he DEMANDED something from me, I gave it, and right away that +1 put me back into pleased mode with him again. So I got the coal back