I think we have to play to our strengths - namely speed, puck possession, and active d.
I think you put the puck into the corners and use your speed to hound the Leafs D. Might take a few big hits but Fraser, Phaneuf, Franson, O Byrne, all have been prone to giveaways under pressure. I think over 6-7 games we can wear them down.
I think it's a mistake to try to match their physicality or play defensive. Certainly, we need to answer the bell when appropriate and take advantage of opportunities to put hits on Kadri, Lupul, Kessel, etc.