I was thinking of doing the same thing, as a second cycle, Epi alone was first.
Just run the Epi at 40 right through. maybe 50 at week 3 if blood pressure/pumps are OK.
The epi alone made me lathargic for a couple of weeks at the end, the stano should stop that.
I was advised to run the stano at 800mg or 1000mg right through.
Im not sure this will give better gains, and 600 may do what you are looking for anyway.
As for PCT, I only have experience with Nolva.
Hopefully someone else will chip in.