I can totally relate to the acid reflux from orals. They are awesome in their immediate and potent effects, but they are just so tough on the body taken orally.
I haven’t used injectable Msten but have ran regular oral and found it to be very dry, all glycogen in the muscle and great recovery. Really cranks my bp and works my liver hard, but it was potent in effect. In general it seems like most orals that are injected seem to be drier as well. Less water size/mineral retention, less stress on liver and gut, more potent true effect per mg. Injectable LGD at 25-30mg was a real oral for me, while 20mg oral is kind of a joke.
Honestly injectable winny is probably the only AAS I would never try. Too many horror stories of infection. And I would try a lot. PIP is one thing - you can change sites or just stop using it, but infection is a serious issue. Winny just sounded like it really meets your needs, because it sounded like you really want the dramatic effect of an oral while in a deficit, but many injectable orals/SARMs would probably give you the same strength/fullness I expect you are craving. Winny is just drier and harder than most everything else by most accounts.
19-Nors in general are bad for your heart. They don’t inherently bring estrogen, which is cardioprotective, they tend to raise BP a lot (bad for kidneys, makes the heart work harder), and I think Tren especially remodels the heart some. And it’s fairly hard on lipids (so is dienelone, from experience). But all AAS are bad for the heart, and I think the overall amount of exposure to Tren is probably the bigger culprit. I personally expect that someone adding 25mg/day of tren ace to a low dose of test for 8 weeks isn’t going to be worse off than using most other orals at effective doses.
If health & gut comfort was the complete priority, test and Masteron just make the most sense. Everything else I’ve discussed is gonna probably trash lipids.