If you have been lifting for a while, it shouldn't be that difficult to lower your body fat levels, first of all drop all kinds of junk, keep doing the big three but now do your reps in the 15-20 for squats, 10-12 for benches, and 6-8 for your heads, plus 10-12 for most of your other exercises, you should see some good results just from that, if it's possible stay drug free for as long as you can! Best wishes.