Your balls will always shut down on cycle to some degree, that's just part of running a cycle, whether or not your balls shrink is up to genetics. Or you can take hcg, but that will also raise estrogen. So AI on cycle will be important. And because you've already had experience with gyno you know that you don't manage estrogen well so you need to always have an AI and a serm on hand.
You haven't really asked a question that can be answered by anybody. You just started mentioning products and peptides but you didn't say any goals. There's 11 million peptides that do 11 million different things.
Also boner pills don't do toooooo much for a pump in the gym, they do a little bit, it definitely does something, but you'd be better off just taking a pump product. And honestly when your body fats high you're not really getting a pump anyways. You might think you are but you're not, @270. (And I'm not trying to sound like a dick you've had some amazing fat loss already with 40 lb in 3 months) I'm going to assume body fat is still very high and that's also playing a big factor with your estrogen issues and the gyno. And the higher your body fat is typically the more body fat you gain when your goal is gaining muscle so I would just continue on with my diet and cutting for a while.
Maybe if you could be a little more specific in your goals and current diet/training I could give you a little more direction.
If your goal is just to run a cycle with low risks geared towards fat loss.....
Test 300mg per week
Tesamorelin 2mg per day sub q
Have a real AI and Serm on hand, not estrogen blocker supplements. Or you could start something like an over-the-counter estrogen blocker and have your AI on hand just in case but given your past history I think the over-the-counter supplements are a waste and you need to have some arimidex on hand.
Hcg 250 iu EOD if you're worried about your nuts shrinking
PCT world be stop the test but continue the hcg for 3 more weeks and then start enclomphine or nolvadex and run one of those for 4-6 weeks