IMO, and that of Dr. Crisler the blast portion is excessive. Those doses are typically what will desensitize Ledyig cells although you're not blasting long enough to do the damage after one run. Is the damage caused additive, I don't know for sure, but I for one won't be risking it.
There's only so much stimulation that can occur with any amount of HCG used so claiming it gets the boys back online ASAP is erroneous. That's why Dr. Crisler recommends doses no more ban 500iu in any single day, there is no added benefit. What you experience is either nothing or placebo unfortunately.
From the man himself:
http://www.allthingsmale.com/word_docs/HCGupdate.doc
HCG is a suppressive compound by nature, it suppresses the pituitary production of LH. I never said it's use prevents shutdown.
If HCG doesn't help all the way why are you using it so excessively? Your example is not a logical one. You're basing it on the fact that HCG helps sustain or recover endogenous test production (among it's other uses) but you neglect the fact that prolonged use of it can lead to primary hypogonadism...one of the conditions you're trying to prevent. Furthermore, chronic supra physiological hormone levels are deterimental to many health markers. Running year long cycles won't matter much if you die from polycythemia (blood clotting due to elevated HCT), have dangerously high BP levels, your lipids get so out of whack that it leads to heart disease, you damage your liver to the point it's useless, etc.
I'm not saying Dr. Crisler is right or wrong, nor am I saying I'm necessarily right, nor any other doctor for that matter. In terms of recovery of one's endocrine system I don't think there is much that could be considered an exact science. If Dr. Crisler says that 500iu's is all the body can handle at once, fine, but I would disagree and so would Dr. Scally and his PCT protocol that has helped a lot of people recover. Again, I'm not saying anyone is 100% right, because honestly there are parts of Dr. Scally's protocol that I disagree with, but if something works, I'm going to go with it.
I understand that the leydig cells can only take so much stimulation and that there is a chance of overstimulation and thus actually damaging the sensitivity of the leydig cells. However, I do not believe that 2,000iu's Used five times over a span of ten days is enough hcg at one time to do damage, nor is 10 days a long enough span of time for the damage to occur, this isn't just my personal opinion, there are many HRT doctors that prescribe such a protocol with success(and thus we can assume that little to no desensitization has occurred) and there are studies to back it up.
I do not agree that a blast is completely unnecessary and useless, but if you wanted to argue that a blast unnecessary/excessive when a person has already been running hcg on cycle, then at least some of the time I would agree. For me personal, I'd disagree, but that's only because, even at 600iu's a week on cycle, I still experience some atrophy, although minimal. So, a blast, and I'll maybe go along with the idea that my version of a blast is excessive, but some sort of blast is still necessary for me to get my testes back to as full as HCG will get them. As you know though, unfortunately, hcg only stimulates LH and not FSH, so I don't believe, at least hypothetically, that our testes ever go back to truly full size till they are running naturally...and I'm not ready to even try to jump on the Triptorelin train.
Also, the OP's post was about hcg. Yes, I brought up long cycles, but that was in reference to the usefulness of hcg on cycle. I am/was in no way suggesting long cycles to anyone. I understand the risks I take by running the cycles I choose to run, but to say that by doing so I will automatically have dangerously high blood pressure, will die of elevated hemocrit, have trashed lipids and a useless liver...that might be alittle over the top. I get my bloodwork done ever 3-4 weeks, i can assure you I take all the precautions and am in excellent health.
Side note, I do appreciate good intellectual conversation like this and challenging each others ideas!
