Sorry, I miss read your post. You can use one then the other.
The following is about using SERMs and hCG at the same time, or excessive amounts of either.
Here is why. Both SERM induced LH and hCG can over stimulate the LH receptors. The dangers in that are:
* over stimulation leading to LH receptor desensitization
* high T-->E2 inside the testes that a competitive AI cannot control
* when you stop PCT and testes see a lower LH signal, they will reduce T production
Note that the dangers of stacking SERM+hCG are the same as taking too much hCG or a SERM. More is not better. Yes, this means that most of what you see in BB forums is wrong.