IG,
One should use both HCG and clomid together, since they do work differently the combo would be quite good. I think using HCG during the last 2 weeks of a cycle which will mimic LH and directly stimulate the testes, can make clomid use more efficient. If the testes are not in an atrophied state and an estrogen agonist is introduced, the dual action of blocking estrogen from the hpta while producing ur natural test can increase recovery significantly. HCG only needs to be used in doses of 500iu/day, because too much can cause LH receptor downregulation thus becoming counterproductive, also using HCG post cycle is not a good idea, as it will increase androgen and estrogen levels thus delaying recovery and increasing estrogen related side effects.