Hcg minics LH, its derived from urine of pregnant women. Since it acts as LH, it stimulates the testes into producing testosterone. This stimulation also maintians testicular size.
That said, since it merely mimics LH , natural LH is now suppressed because hcg is doing its job for it. Clomid will help minimize this but it depends on the dose and duration of hcg. As for DHT, its 5 times more androgenic than testosterone and is responsible for most unwanted side effects such as Hair loss, prostate enlargement, and acne. Dht is somewhat of a natural anti estrogen though. Still, you dont want high levels of dht for sustained periods of time.
The range for DHT is 35-75 i believe. also, sustained levels of Testosterone over 1000 may feel good but it can eventually have a negative affect of the cardiovascular system. Thats almost a steroid cycle and you run the risk of raising LDL, lowering HDL, and enlarging the heart.
A level of 1200 is very unnatural. This can prematurely lead to prostate enlargement which most men get after 50 anyway. BPH ( prostate enlargement) is basically a quality of life issue. You may already notice waking up at night to urinate and perhaps your urine stream is weaker than it used to be. It can take you longer to fully empty your bladder. Those are signs of bph.