Civ 5 - "Easily" winning multiplayer ? Been playing alot of civ 5 lately with friends, im really confused by all the techs and actually, despite me having roughly 50 hours playtime i haven't gotton to finish an actual game yet (the beginning is the most fun part to me, just feels dragging longer and longer once i reach a certain point)

my question would be, what is a rather noobproof and quite fast way to win a game in multiplayer? diplomacy wouldn't be an issue i could be able to drag any war's out as long as possible to give me all the time i can get.
i thought about a science victory with something like babylon but it feels like i cant find a proper "guide" to that and i am way too inexpierenced to get it done on my own, atleast efficent enough.

so are there any guides of that sort? or am i left with learning by myself with the mistakes i make every game until i got it down?

oh we play with all dlc's btw. 