Estimating scoring chances isn't perfect but:
Scoring Chances for: 2065 (1st in NHL; Florida 2nd at 2045)
Scoring Chances against: 1606 (10th in NHL; Boston 1st at 1385)
Scoring Chance %: 56.25% (3rd in NHL; Florida 1st 57.35%)
Scoring Chance SV%: 84.86% (3rd last in NHL)
High Danger Chances for: 799 (4th in NHL; Florida 1st at 838)
High Danger Chances against: 646 (11th in NHL; Boston 1st at 513)
High Danger SV%: 78.68% (2nd last in NHL)
The Leafs are elite in generating high danger scoring chances. They are perfectly fine at giving up high danger chances. They are incompetent at having their goaltenders giving them a save.