Miss

The worst for city state manipulation surely would be venice given their spending power?

But I still think sending the rocket off to end the game is pretty epic

Im starting to think that greece is a cheater! I mean, they can have anything through their city states only! Militar power, delegates, money, science, happiness, its cheating!

If you play domination then be sure to discover military technologies and obliterate them before they get too strong.

Also, how do you win culturaly? Tourists?

It's basically overall cultural output with the main component being great works and late game being tourism. 

Boosts come in the form of religious strength, trading, open borders, and how well others can resist your cultural output based on their own influence.

Yea Greece gets really powerful mid game so the strategy would be to take them out or make them weak early on. Especially when they keep getting the patronage cultural policies, where it becomes impossible to take city states away from them.