Assuming you actually want to colonize and not take a city, I can give you some advice that was given to me by mike and chilli. If you colonize do it on a +wood island and use it either as a bireme or ls factory while keeping the city points down. That way if people want to take it the morale will make them look twice. Also, if you just want to colonize to get into a hero world do it on a faster server. Speed 1 really isn't worth the time it takes to build the city up.