Frank Vatrano and Chris Kreider also scored for the Ducks.
Jack Hughes scored New Jerseyâ€s lone goal in the third period, and Devils goalie Jake Allen had 26 saves.
Anaheim has won three straight and five of the last six to move into a first-place tie with Las Vegas and Edmonton in the Pacific Division, an encouraging start for a team trying to snap a seven-season playoff drought. Their 15 points is the most through 11 games since 2014-2015.
The Ducks took advantage of their second straight game against a road-weary Eastern Conference club, outscoring the Detroit Red Wings and Devils by a combined 9-3.
Anaheim scored three goals within the gameâ€s first 22 minutes and dominated the first two periods before New Jersey came to life in the third.
Moments after Allen stuffed Sennecke at the doorstep, Hughes took a pass from Dawson Mercer on a two-on-one break and one-timed a shot past a sprawling Dostal.
But Dostal and the Ducks held off a furious Devils rally in the final minutes, and Kreider scored on an empty netter with 1:54 left to seal the win.
Anaheim scored on its first shot of the game. Sennecke took a pass from Gauthier as he crossed the blue line, shielded New Jersey defenceman Dennis Cholowski with his body as he charged the net and slipped a lunging shot under Allen’s right armpit.
The Ducks made it 3-0 just 1:54 into the second period when Gauthier scored from an almost impossible angle, snapping a left-handed wrist shot from just inside the right goal line under Allenâ€s left pad for his team-leading seventh goal of the season.
Devils: Host the Montreal Canadiens on Thursday night.
Ducks: Host the Florida Panthers on Tuesday night.
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