Medicine tells you that prevention is always the smarter way to go. Prevent your testicles from atrophy and they will recover faster. Do I have a study to back me up on this? No. But ANY organ or body part that gets atrophyc by disuse takes longer to recover than a preserved one.
Testicular atrophy degree will vary with AAS dose, cycle lenght, and sensivity of the subject. I´d say it has more to do with HOW MUCH TIME OF INHIBITION THERE IS, so you´ll have to take into consideration for how long a significative amount of AAS will be present.
I´d say , empirically, to use it every 3 weeks of the cycle, including pre-Clomid phase.
Example, in a deca/Test Enth 10 weeks cycle, I´d use HCG in the third, sixth , ninth and 12nd week, beginning Clomid on the 14th.
I´d use 1500UI EOD in the weeks I´d use.
I´m sure there are a thousand other ways to do this, and people that don´t use it at all, trusting on anti -A to do the trick.
But I assure you that full testis recover faster.