Depends on a number of factors like your age, how much you plan to use, for what purpose you are going to use it for, how much experience you have with anabolics, etc. etc. etc.? There's no one size fits all answer.

well the one thing i do know is that it is expensive. i read 2-4 iu/day. i am 30 years old. i am not a pro body builder but into it very much.

What would you be using it for? fat loss? Muscle mass gains? Something else?

i am currently on a cycle of 900mg/week test and 600mg/week deca

well i was kind of hoping for both. would like to lean up a bit in the mid section but surely muscle mass would be number one