you are wrong about so many things here....
yes, HCG will cause suppression to the hypothalamus and pituitary (but not the testes), but SO WILL THE FUCKING TESTOSTERONE! you're taking HCG to maintain testicular responsiveness, so you will respond better to your own LH later and PCT will go smoother. and if doesn't matter if you're on a progestin based steroid or not... (and you need to manage prolactin there, as well.)
as far as clomid being better than nolva, explain why it takes 150 mg of clomid to be comparable to nolvadex? and more importantly, are you aware that Clomid actually DECREASES the body's responsiveness to GnRH, whereas Nolva increases it? ( http://www.ncbi.nlm.nih.gov/pubmed/640052 )
and we use AI's on cycle, because estrogen is several hundred times more suppressive to the HPTA than testosterone. so if you end a cycle with high estrogen, you simply can't recover.
i'm not even gonna get into the multiple SERM stack crap....
you need to do some reading, plain and simple.