3AD + Havoc its a good stack :thumbsup:
Probably the only side will be hairloss (havoc its harsh for hair, and 3AD PH (Androsterone (3a-hydroxy-5a-androstan-17-one)) its DHT related), so if you are prone to MPB, say "goodbye" to your hair.
But if you aren't concerned about hairloss, 3AD+Havoc its a good stack