So, here I am, hooking up with my main man Survayarman II of Khmer. On Noble diff, BtS, Continents map. I keep an eye on my tech rate as I use the worker-warior-worker-settler method. All of a sudden I go from 100% tech down to 60% in a heartbeat, so I stop after 3 cities. But, I see the tech rate go down even MORE to a mere 30%. I'm still winning, because the only civ I've met was HRE. But I'm in trouble. Is there any way I can salvage this game, and if not, what should I do next time?
I used to always priortize science and often expanded to slowly because I wanted to keep my beaker slider high. After following some upper level walkthroughs I have seen people with 0% science and 10 or 15 tech behind. This would have freaked me out but they bounced right back. Here are a couple things I noticed:
1) great people bulb techs early on the tree. Later they will only cut the time needed to research a tech but that can still be useful. I would always merge GP's into the city for bonuses but they can help catch up on the tech tree quickly, espically GS. Acadamys are powerful. If you can't build wonders (and even if you can supplement them) with specialist. Make sure you have plenty of food in the city and whatever buildings needed to produce them (libraries=GS) and Caste System is beneficial.
2) total beakers more important than slider. It is hard for me to judge what a good number of beakers is but if you have libraries and monastaries and such you can drop the slider and not lose beakers
3)trade, trade, trade. I used to be stubborn about this because I wanted to get wonders or keep AI from getting military advantages but as you move up in difficulty wonders are less of an option so whoring out techs is necessary. Also instead of scattering around the tech tree pick a line and run down it. Get to a tech no one else has and backfill other techs through trade. Also don't let spare resources go to waste. Eve 1 gold piece per turn is better than letting them sit idle. This will boost diplo also
4) courthouse, forbidden palace and select marketplaces help a lot with upkeep and commerce. If you have good relations and trade options harbors and castles and custom houses can be a big boost.
5) early tech are cheap so you can make up a lot of ground quickly is you can become bigger than anyone and develop your economy. Cottages don't help much early but as they grow they make a big difference. You can also build wonders for failure gold or produce wealth (not my favorite choice but necessary at times)
Hope some of these tips help. On noble you should be able to get 5 or 6 cities fairly early I think. I just popped 6 on monarch before COL or CUR and although it put me in a tech hole I cant keep up with AI anyways, so the land was very valuable. I am back to 60% now and only 4 or 5 tech behind most people in the midevil era. One or two good techs and trades and I will be back on par.