Clomid 50/50/25/25 is gucci, arimidex is an ai and wont do chit in terms of rebooting hpta...if you want you could run an ai like aromasin past the serm to prevent rebound, but thats the only reason I personally would consider adding an ai to your pct...arimidex isnt as good for running past the serm to prevent rebound because it is not a suicidal ai like aromasin, reducing the risk of estrogen rebounding on ya m8