Bollocks to taking glucocorticoid's in PCT. Why would you want to take compounds that increase the chances of losing LBM? Whther they decrease cortisol or not.
GC's will also inhibit the synthesis of IGF.
They also inhibit DNA and collegen sythesis in bone cultures.
There are other far more efficient ways of reducing cortisol during PCT.
For endurance, yeah, maybe. For bodybuilder's, no chance.