1705 isn't too bad!
Doing a proper write-up is very daunting as there's so much to cover and such a long time span, so I didn't start on one yet, nor do I think I will. Maybe if this thread sees good activity. It's much easier to answer such questions.
I took MT with
Liberalism 300-350 AD somewhere. I figured (correctly) that there was more to gain from the earlier capture of cities than getting more beakers with it later. Also worth mentioning here that I didn't have machinery, so I could lightbulb liberalism itself (this rarely happens). I did tech the "worthless" compass to enable it though. But it's basically liberalism for 700 or so beakers. Or in this case, MT for 700 beakers.
Oxford was not built until 580 AD (delayed due to war preparations).
Teching came from all kinds of sources. I had a monster capital with towns, I had cities running representation specialists, etc etc, but I guess the main thing would be having a large empire early. Size matters.
I had reached my limit at 1000 AD (although some areas were still revolting). Some numbers for reference:
600 BPT (GA) 350 AD
1150 BPT at 720 AD
3000 BPT (GA) at 1000 AD,
5500 BPT (GA) at 1150 AD (at this point some coal plants have finished and I'm producing research)
I was running representation and bureaucracy all game, and as it turned out I remained in caste system for a while even after discovering Democracy. This was one of the awkward situations. I wanted to start growing cottages but the captured cities were still revolting and I needed a couple of GPs so I remained in caste. My early Democracy only resulted in the SoL.
Also I had no way to get a GE in time for corporations, so going state property seemed obvious for less maintenance, but then: why not also run workshops? Basically it all turned into a mess and my tile improvements from ~6-700 AD and onwards were poor (or at least weird). I was running representation+emancipation or caste (switched between) +SP and making cottages. A truly weird and suboptimal mix. Considering the early finish, all of the improvements after war, even in most of Babylon, should've been workshops. For reference I wiped out Babylon -> Aztec -> France.
I never got enough towns to warrant universal suffrage either. I had 150+ villages at one point, but only a few dozen towns.
I've no interest in playing marathon speed so count me out of the BC space race.
Speaking of game speed: games like this actually remind me of the many disadvantages of normal speed. For one I launched 1350 AD but didn't win until 1450 AD (strict 10t wait). Secondly cities that I captured in the 500-800 AD range were in revolt for nearly 10 turns -- that's 2 centuries on normal speed. So much lost science and production. Then there's the "obvious" parts like travel time.