run it 8 weeks on cycle... you need to cycle off of it... you can run a number of other things in pct... regular hcgenerate, unleashed/post cycle, phytoserms, etc...
I would prefer HCGenerate ES on cycle and you could also use it in PCT, but its main purpose would be on cycle use to minimize shutdown. For PCT you could use the Unleashed/post cycle combo with Clomid/Nolva and a decent AI which would be a good PCT.