The 2009 world champion finishes the season with three World Cup wins to his name, having also won last time out in Are, Sweden as well as in Japan last month.
And on Sunday he edged out close rival Mikeal Kingsbury of Canada, who has been in red-hot form this season, winning eight World Cups, including the first six, but had to settle for silver in Megeve.
Bronze went to Canada’s Marc-Antoine Gagnon while Kingsbury, who had already long since wrapped up the overall title for both moguls and freestyle skiing, ended the campaign with 1,180 points.
Deneen was second on 715 while his American teammate Jeremy Cota was third on 674.
In the women’s event, the USA’s Hannah Kearney didn’t end her record-breaking season as she’d have liked, coming home in fifth – her lowest finish of the campaign.
Nonetheless the Olympic champion did win 11 World Cups and break Sweden's alpine skiing great Ingemar Stenmark's record of 14 in a row this season and ended the campaign with 1,195 points and another overall title to boot.
On the day it was Canada’s Justine Dufour-Lapointe who topped the podium for the first time this season to rubber stamp her finish of second place overall while silver on the day went to Miki Ito of Japan and bronze to Chloe Dufour-Lapointe.