Personally, I don't think the decision to potentially bypass the body's natural production system by adding the end ingredient is a very good way to go. This is a LIFE-long decision. You start, you basically stay on for the duration.
With respect to low T and average E; clomid will act like a less estrogenic compound than typical circulating estrodiol. Therefore, the brain will sense a low level of T and E and will pump out more LH to try and stimulate the testes. That's the theory. I have many friends, acquantances, and enemies who have gone the proper route as I have mentioned and have checked the testes first via HCG, then went on clomid therapy and have great testosterone numbers.
I understand that some might have to make a financial decision, and that going the straight T-injection or T-gel route is more cost effective. However, if one can afford it, I believe the PCT used by many steroid users over the decades can have tremendous benefits for the aging or low T crowd.
If your testes are fine that is! If not, then straight T is the way to go.