I've never been able to track down the dropout issues that I've had with the HarPeggiator fuzz. I chalked it up to some phase flip in the pedalboard that I may have missed.
Now that I've Max'ed out an H9, I thought that I might be able to 'flip it back' with 2 HarPeggiators in series [PitchFactor + H9]. Not much luck with the fuzz dropouts so far (but some incredible results with random filters in series).
I'm still looking for a recipe to nail it all down. I haven't experienced the Octaver issues that you mentioned, but that algo gets more limited use here.