In general I always do HCG while on cycle. So doing monotherapy only for pct or just while off a few months would mean I'd never be off HCG. I'd think if we're talking androgen receptor down regulation as a reason to come off AAS. Then there's a case to come off HCG too. Unless not on during cycle.
I always heard for Pct you don't start anything for at least 2 to 3 weeks after your last shot of an enanthate ester. Reason being our system won't properly restart with the synthetic test still in us. Once it's out. 3 weeks of fairly high HCG to kick start then 4 weeks of clomid and nolva. The clomid had a specific reason, and the nolva I think was at least partly to combat estro rebound and gyno. If it was suppressed during cycle. That was my general understanding of a real full pct.
I've come completely off before for months after a pct and also without any pct. For me, honestly, I feel great when I come off. I find usually when I come off I'm ready. I've pushed, dug in, and my system just needs it. All in the head? I dunno. Same with when I think of coming off, I kinda dread losing that focus and fullness but once I do it, it's fine.
The only thing I noticed really is without the pct my libido did suffer a bit when off. Everything else though was good. Kept food and training near the same, got tad softer but mindset and workouts were great. But then you start to miss that extra umphf and go back on after a couple months.
So, op all this to say I haven't yet blasted and cruised, but so far I find I almost need to come off. Mentally and physically, at a certain point. Wether it helps receptors or not. If it makes me feel refreshed then for now that's how I plan to keep doing it. Will the time come when I b and c? I'd say most likely at some point yes. But not quite yet. I just like or need that break at a certain point.