Lexi Smith scored a hat trick in the victory and was given player of the game honours.
Smith scored her third goal in the second, assisted by Erin Near and Ballantyne. Rebecca Ropp earned the shut out in goal for the Lightning.
The Lightning opened the tournament with a decisive 4-1 win over the North York Storm.
The Lightning downed the host team, the Mississauga Chiefs 4-1 in their second game. A win against Brampton in their third game secured a berth to the gold medal round.