You could be like me. I respond really poorly to some steroids, notably Hdrol, Epi, Zol, all had 0 effect in terms of adding weight and adding strength.
Superdrol is the only one i've tried that has worked very well, as good as PH/DS work on other people anyway.
you could try with higher doses... but i'm guessing you just haven't found the compounds your body likes yet. What else have you tried?