I would not advise anyone to take Norway, unless this player already possesses a large fleet and a trading network stretching from the Baltic to Ireland, epsecially if it is a faction that cannot produce Vikings. I was simply suggesting that Norway can be used as a stepping stone to Sweden. The Teutonic Order has plenty of enemies, making it necessary to churn out troops in all possible provinces as there is usually at least a battle per turn, making it hard to devote any province to shipbuilding. With an Inn in Norway and some luck - plenty of mercenaries available, Sweden can be conquered even without a fleet. The initial hiring cost for the mercenaries will be high, but it will be similar to the cost of building a keep, a port and a wharf in Estonia for example, and will be offset by the pillaging in Sweden once the province falls. But I have to admit, I have never tried anything like that, and it may be a lot more difficult to do in practice than in theory, especially if mercenaries refuse to show up in the Inn in Norway.