By MT I assume you mean MS - of those 4 guys 3 are "offensive" defenseman, with Dahlin the only one of the 3 who might be considered sound defensively. Power has been a disaster in his own zone, and Byram has been up and down (though the offense seems to mostly make up for it.) But when we are defending a lead, this team isn't generally looking to generate offense and our strength on D becomes a weakness.