As someone who's had plenty of accusations since the age of 15,i think you shouldnt care whether he is on gear or not,just simply try the routine,if it dont work foou,dont do it.
Even now having had a few years off from intense training due to lower back injury and then a bike accident,i get people who're very surprised i dont take anything and when i tell them that i never have done,they look at me quite incredulous really.
As for drop sets,have done them,have got gained from doing them but find i go into overtraining/tired state after a while(maybe a month?).
Easiest way to add some into your existing workouts and see how things go.
