I would use at least a small dose of test. Test is your body's natural means of maintaining all things that are male. Not sure why you wouldn't want to ensure that you had an optional level in your body. HCG would help, but I'm not so sure about HCG alone, as your only source of test. Also, You'll find that primo and mast have a fairly similar effect. I'd personally pick one or the other and run it along with some test. I would then use an AI to control water retention and maintain normal estrogen levels.