You should put points into Dazzling Steel to get that debuff to over 40%. Maybe there is a class that can debuff DPS by more then 40%, I am not aware of what class that would be. The rest of the debuff line is not that impressive. Thankfully maximizing Dazzling Steel is one of the initial choices. The riposte reduction ability also seems interesting.
The problem with the debuff line is that it will not improve your parse in any obvious way.
