GOTM is a great place to learn because you play the same map as any pro's playing and they will say what they did at the end. Everything as fast as possible at the start sounds easy....there is just too much to say in one post. replaying games to get them faster also helps. Play the same game to T70 a few times.you start seeing how fast you can get to feudalism. Knights or horsemen are the way to fast dom's An archer or warrior army first, sure but you do need that conversion and you do need that science after T70. Culture start into either theaters or campi at around T70-90, you should have 10 cities by then and your science will outstrip everyone as well as having a strong veteran army.