D is just inconsistent from game to game, week to week.
Wiz is our #5 Dman. Is he the 5th best? Well, when you're ranking it depends on what you're looking for. He's one of our top two OFFENSIVE defensemen, but his play lacks in his own zone. So if you're criteria is taking everything into account, it's hard to say - i.e. can offensive value offset defensive deficiencies?
On any given night:
1) Tyutin - most reliable, imo. nothing too flashy
2) JJ - can be wildly inconsistent, otherwise #1
3) Savard - half a dozen goals and playing against top lines defensively
4) Connauton - based on limited sample size. basically supplying the offense expected from Wiz and better on the back end
5) Leopold - similar to Tyutin, quiet and steady
6) Wiz - offense lacking a bit this year, probably due to injuries. Lots of dumb mistakes and poor skating in own end. Could jump up here soon now that he's back to better health
7) Goloubef - has played well when given time, but another small sample size
8) Prout - nothing offensively and a bit slow defensively as well. Still learning/growing, but often a liability on the blue line
Murray - N/A Where he was projected to be when healthy? Probably top 2/3 this year. But we just don't know at this point so he's off the board.