I would use hcg at low dosages during cycle or the last two weeks before pct starts. If you use it at doses at or below 500ius ed for the two weeks before pct I dont believe you will have any desensitization issue.
The hcg use will cause a rise in estro so I would use adex. Nolva will not lower estro, it will just occupy the estro receptors in your breast tissue.
Use adex at .25 or .5 ed during the hcg use and the day before pct starts stop. Next day start your pct of nolva/clomid or clomid/torem....