Burke's rating System

Steve says:

I found this interesting read...it gives a glimpse into how Burke rates his defencemen:

"I have a system of rating players, "he said, "particularly defensemen. I rate them from one to six…six being the elite defenseman." He went on to explain that his objective is that of the six primary defensive positions on his team, he wants one from each point category. He claims that if you have one "six," one "five," one "four," etc., you'll have a team capable of competing at the highest level. If you add the numbers together (6+5+4+3+2+1) you wind up with 21 and that is your objective. "Now understand," Burke continued, "there aren't enough ‘sixes' to go around, but that's okay. If I have two ‘fives' and two ‘twos' I still get where I want to be (21)." He went on to explain that, the way he had it figured, he couldn't have too many defensemen, since he could almost always trade the excess for a forward and usually one with tangible skill. And generally speaking, history has shown he's right. Having an excess on the blue line is approximately the same as having an excess of pitchers in baseball. It doesn't happen often, but if you achieve it, you can always fill any other hole that might materialize.

So, with that in mind, what does the Leafs D add up to?
Is Kaberle a 5?
What # is Schenn?

Chris says:

Schenn is a 5, with the potential to be a 6. He needs a little more seasoning under his belt in order to reach elite status.