I'm no expert, but steroids are going to help you push beyond your genetic limits. Most people would have a difficult time reaching their genetic limits. I know several people on very high doses of steroids who are very weak by natural standards. Just because you're on juice doesn't mean anything is going to change. Training and diet are everything when it comes to strength, juice is only a booster if used properly.
People seem to have this misconception that roids are the reason for people's physique and strength. You can get freaky strong with or without them, just train hard and eat accordingly!