I just played as England and I took british isles I then took out France held borders with hre spain and portuagal ended up taking out moors long story then ended up taking out the danish after a request to take out their king (i forgot about them) I then ended up sending a ship across to Russia and conquered it then i shipped out to Egypt took all of Egypt Jerusalem Acre. Then Mongols came they fought the turks won Antioch and i thought a bit of expansion was need so i just killed their 3 settlements then allied with byzantine empire I also noticed everyone not caring about the pope anymore Sicily and Milan especially they could give 2 s what the papal states tells em and I almost forgot i took Rome gave back to Papal because of request got my popularity with Pope a bit (nearly got excommunicated) then i took the Sicillian city below it Naples i think?. Also I could of wiped all of Europe out if i wanted to but i Wanted to see what would happen Spain then rebelled against papal Venice is very loyal I think its only cause their fighting Byzantine but atm I could pretty much destroy every faction if i wanted to i am way ahead in technology and all the other factions are no were close. P.s. I decided to stay on Popes good side.
Tips with England
Take out Scotland as soon as possible expand into Bruges Rennes and the rebel city beside Bruges take out France (might want to allie with Milan to do that) then you can just go were ever you please i recommend takeing either spain or going the hre root and working your way down all of Italy then venice and attack them in order and don't forget them Danish.(they usually do nothing)