As has been said, a clean diet, cardio, and training are the key. You simply can't drug your way around this, although some steroids like tren, mast, winstrol, and to a lesser degree anavar are fat burners. And of course moderate GH makes a big difference. But after 43 years in this game (25 using gear) it always comes down to the training and diet.
Think of fitness as a deck of cards. A bunch (you deal out) are training, then a bunch are diet and you are left with quite a few still. Gear should be considered as 7 or 8 cards. I have been on TRT/HRT only for the last 3.5 years since my last 2 shows (fell short of getting my pro card...in open bodybuilding not that other...stuff) and honestly my diet is less than perfect. Not bad, but certainly not a super clean bodybuilding diet. Intermittent fasting, which I am sure has been discussed to death helps, as does a lot of supersetting/giant sets.I will use my back routine as an example.
When training, start with basic exercises on something like back and do traditional sets, keeping your reps on the high side (around 10 or so...I assume you have done basic power-bodybuilding training in the past to set a foundation). Do your traditional rows, lat pulldowns, etc. As you get close to finishing back, start supersetting. Say lower lats. Continue supersetting, say traps and rear delts so that by the time you are done lifting, you have been supersetting for a while, say 13-15 minutes. This training should be extremely hard...brutal. Once done, go immediately to your cardio and do lower intensity cardio (although you should be huffing and puffing for a while still from the giant/supersets sets) until finishing a total of 30 minutes of cardio.
For diet, I will eat clean quality protein and carbs, but I also have some pizza/pasta. ice cream as well in moderation. The hard training and IF seem to smooth everything out. And my IF is tame, I eat on a 12 by 12 schedule.
From here, now the drugs come into play giving you that last 10-15% or so needed.