The reigning World Champion picked up his first win of 2014 when he topped the podium in the night competition in Germany on Saturday.
And there was no dislodging him the following day as the jumpers returned for the large hill individual event.
The 26-year-old was lying second after his first jump of 147.0m handed him a score of 131.3 points before he picked up the round's best score on his second jump with 140.1 points.
With an overall total of 271.4 points, the Pole took his fourth World Cup victory of the season by 13.5 points, beating Germany's Severin Freund into second and Slovenia's Peter Prevc in third.
It also moves him into the lead of the overall standings on 921 points, 13 ahead of Freund, giving the former the mental edge going into the Winter Olympics.