Hi, I have notice a bug (I supose).
As Defender Archetype, with epic mastery "Power Mastery" we have the power "Power Build Up".
Power Build Up + Fortitude (Empath buff) = Def Buff boosted.
But in my case, I use Cold Domination :
Power Build Up + Ice Shield (or Glacial Shield) = NO def boost.
The def value don't move at all with Cold Domi shields with Power Build Up.
(Tested with friends to be sure)
Is it a bug or do I miss something ?