It's not at all unusual for the Developer to pick up 3 or 4 victory point cards and Largest Army, so they often only need to build a couple of settlements/cities to go out.
This strategy focuses on development cards, building other things only as an aside when development and resource cards dictate it. They'll usually end up with the Largest Army card and the lion's share of the victory point cards, and generally make a fabulous nuisance of themselves. This is a great strategy if you have good ore/wheat/sheep balance, but is always fun to play, especially because you'll be dropping the robber all over the place but your board position will appear sufficiently weak that you're not always the most obvious target yourself. It's not at all unusual for the Developer to pick up 3 or 4 victory point cards and Largest Army, so they often only need to build a couple of settlements/cities to go out. This is surprisingly easy to do with Road Building, Monopoly and/or Year of Plenty cards to help.