That is an interesting question. I have no freakin' idea. I just see two or three guys wacking it around the boards.
I assume you know so could you please enlighten us non-players.
I struggle understanding the nuances of the game but have learned more about what makes a good D-man from the discussions here.
I just notice that when Dubi and/or Jenner are out there the center is just as active on the forecheck or cycle as the wingers are. The three forwards just make sure one guy is playing high enough to cover but they cycle through so it doesn't matter what your position was when you started the shift.
And when Wennberg is out there he is usually the high guy with the two wingers in deep. He was playing too high but is gradually coming closer to the scoring/dirty areas.
In some systems the center is typically supposed to be the responsible guy playing higher up, but it doesn't seem that way with Torts.