I did deca only and it was bad. I got very depressed, nuts shrank up to almost nothing, severe drenching night sweats.... Also, gains were not much to really see a huge difference.
Test at same dose was magical, looked amazing, hard ons all the time , felt like I was 20 again.
I feel test plus an AI, and finasteride is a safe and almost side effect free cycle ( if u keep it 500 and below per week)...