The extra scoring of Mapmaking, as for Gunpowder, is what makes it sweet (along with the no consolation for opponent), especially in a game with the bottom ages cleared out. From what I gather (it is hard for me following a log without having a board to look at), that wasn't the case here. Against a Fermenting/Reformation vacuum cleaner, this combo might reveal its true power. But then again such an opponent has few high scoring cards to go far (before mounting his bicycle, after which it'll be too late).