I am far from a most effective player, i play on speed 5 all the time. Besides that, i am overly cautious and always pause my war efforts after difficult conflicts at least to deal with the upcoming rebels/finish coring/regen manpower, dislike having multi-front wars in general and still and up with over a million troops and 5-6-7k dev empire when the 1821 arrives more often than not. I also often do experimental ideaagroup buildups to play from different strengths that the ideagroups can provide - but it is crazy how far a few really simple rules can lead you even if you cannot be bothered to microcontrol.
So basically, do whatever you want to get your portion of enjoyment from the game - otherwise it is pointless.
P.S: Just don't fear the inflation numbers and take all your opponent's gold in peacedeals, even if it mean you will take 1 province less to do so. Now that the AI is richer than ever, there's no real need to save your income for buildings.