Re: First cycle Pro-mag
ATD is a useful enough AI and dosed properly is a realistic pct option in the absence of a serm. I'd be more likely to run it at 2 caps per day (morning, night) for 6 weeks for pct. You don't need a bigger dose up front as you shouldn't have mass excess of oestrogen in the system after a cycle of non-aromatising p-mag. Likewise no real need to taper down from two caps at the end, but you could run a week at 1 cap at the end if you so wished.
The 'Perfect PCT' is a support product and no more than that imo, you could use that (and/or the DAA) next to the ATD in pct, but not instead of.
I can't see you having any need at all for ATD whilst on the cycle itself, the chances of gyno really are so slim, I'd almost bet my house against it. Nervous itching and paranoia are likely though and very common on early cycles.
Good luck, its a good cycle choice and whilst a serm would be a more ideal pct, a lot of people prefer an AI to a serm for pct. ATD, whilst not being a pharma med like Arimidex, Aromasin etc, is all the same an effective AI.