No, I wouldn't recommend steroid post LL unless you're the type of guy who wants to get big but has no discipline or will-power to lift weights at the gym. I read somewhere that it accelerates your aging process so if your skin doesn't mean much to you, then by all means take it and get big.
Guys who take steroid comes in a variety of height so it doesn't matter whether he takes it post or before LL.
I do agree with you with the effect that steroid has on confident and focus. I know a guy who is nervous around girls but he takes steroid, not to get big, but just to feel confident before going clubbing.
If needed, I suggest ephedrine combine with a load of caffeine. This also pumps you up before a workout.