I used to be like you, thinking that I could make gains without shutting my test down by using clomid/ estrogen receptor blockers or aromatase inhibitors solo to boost my test. Sounds good doesn't work.
Clomid is good for refreshing your HPT axis after a steroid cycle, but that's it as far as bodybuilding uses go.
Estrogen goes a long way to help you feel normal, horny, healthy and happy. Block it with clomid and your going to be one unhappy camper.
People take it to get them back to normal, but that's it and many report very unhappy experiences and side effects while on clomid or nolva.
Estrogen is also anabolic in its own way, different to androgens but still promotes cell division. Often it's a good ratio of test to estrogen that builds the most muscle.
Sorry for the overkill but yeah, doesn't work. Don't try HCG solo either.
All the best.