Four FC+7% pieces, two 6-10% Aspir Potency with good MAcc pieces, and multiple pieces of MAcc, MAB, MBD, etc pieces, and my luck with -DT stats has been pretty meh too. Can backup Lyra and say I've seen -4% DT once and -5% PDT or MDT enough times to count on one hand. I'd imagine it's just a very rare offset augment.