when you run deca you cover all bases.
an AI is as important as anything. if you control your estrogen you can control your progesterone.
and i always recommend a light dose of caber with tren or deca. it will protect you from getting deca dick.
also you need to keep the nuts plump during cycle. hcgeneratre during cycle or hcg. COVER ALL BASES. don't go into PCT with high progesterone, high estrogen and raisin nuts and complain that deca messed you up .
if you are still worried then before cycle and then week 5 or 6 get bloodwork done.. check everything. see what is getting out of control and go from there.