Well if the guy started with DECA and Test they both should kick in at around the same time.

I used 500 mg test with 400 mg DECA. The Test did NOT help. I still had DECA-dick. I tried lowering my DECA dosage at the end (still have a lot of DECA left) to 200 mg. I still had DECA-dick...shit stays in yoru system for a while. I hear that a 2:1 ratio of test to deca is the safe way to go if you are prone to deca dick.