Well since you are kind enough to ask what I think...I think you are completely clueless. If dd applied to ffs based damage, then a dekan hitting for 50k ffs on someone with 40%dd and 36% skill defense would hit for roughly 20k with a skill on a 17 second cool down.
Then...we'll nerf blunt mastery...but just a bit. With that same 40dd your still going to be eating 20k+ from a regular hit. If by nerfing blunt mastery just a little bit...you mean nerf it 50%, you still want to set a dffs on a 17 second cool down to the equivalent of what a templar hits for in a second? And that doesn't even fix the problem that templar dps is so far beyond any other classes its really not worth playing anything but a templar.
I think your pretty backwards here, blunt mastery needs to be nerfed into oblivion, and vit dekans aren't nearly as OP if you get skill defense gear.