A few more micro analness : I felt it's better to leave the corn in Paris for now, and to work a coast instead until we get Bronze Working. Population grows too early, and we can't do anything about it.
We have to remember to not unload the worker on the same tile as the settler : on almost every site, the worker starts working on a hill, and if we don't unload it on it, we lose 1 turn climbing it.
I'm not sure ultimately about chopping the forest to rush the Oracle : the speed at which we get Pottery becomes the limiting factor. Without chop, I could 3 pop whip it 1 turn before we get the tech, so had to wait. Ultimately this chop turns into food that we save, and we can agree that we have this a-plenty. For the colossus now...
Thus said, I just did a testing with settling on the W grassland first, and having this city build the forge and the colossus, pumping settlers and workboats (and a couple of triremes) in the capital.
We get the colossus much later (still assuming a worst case scenario without copper), by turn 150, but the rest of our mighty empire looks quite good : there is 5 cities, with adequate workboats online, trireme for protection and a second worker out (who admittedly don't have that much to do).
I played a few more turns to around 160 and we have a max BPT at about 75, and most importantly, a sustainable research rate at about 75%, around 60bpt.