i think if you're a competitive bodybuilder...youre impeding your progress by coming off if you are PAST YOUR GENETIC LIMIT. It's as simple as that. It doesnt mean you need to take large doses in order to stay anti catabolic...it just means bridging with an amount u can get by on to maintain mass, say 250-300mg test (depending on how far u are past your limit), with some hgh, and possibly slin, and or igf. of course, the glutamine/bcaa's, creatine wouldnt hurt also. I honestly dont see how such a small amount of test can hurt the liver or kidneys...in which case..i dont see a point in coming off unless you WANT to get smaller and impede your progress, and have to spend some of ure next cycle gaining it back..theres absolutely no point in that, its unneccessary. This way, you go 2 steps forward...wait a couple months..then go another 2 steps forward...etc..makes better sense to me really...UNLESS you are below your genetic potential, then..thats a completely different story.
As for your balls shrinking and whatknot by staying on so long...its been generally accepted I belive that between 2-300 iu of hcg mon/wed/fri is usually the best route to keep normal test levels flowing. I use 200iu mon/wed/fri..have for the last 9 months..and my nuts are still normal sized. Ive heard hgh helps in this aspect as well, same with igf, but im not totally sure on that one.