At a younger age, generally comebacks offer beginner-like gains or even faster, so there’s really no point to including anabolic steroids until getting back close to natural peak.
However for the older lifter this often is not so.
Depending on personal preference, I’d consider either of two plans:
The first would be to increase T levels to high normal or even somewhat above, while maintaining LH production. One way to do this would be HCG use (for example 500 IU 3x/week) combined with either a SERM or an anti-aromatase. For example, you might use Clomid Clomiphene Citrate 50 mg/day, or Femara Letrozole about 0.36 mg/day. Test blood values occasionally. If LH becomes abnormally low, lower the amount of HCG. Another way would be to do the same but to use an injected anabolic steroid instead of HCG, at about 100 mg/week. A personal preference would be Masteron or Methenolone Acetate Primobolan Pills, but testosterone could be used. Again, ongoing LH testing would determine whether you needed to lower the steroid dosage.
I’d evaluate gains in the gym and see whether this was satisfactory or not, or at what point results started becoming unsatisfactory.
The second plan would be to use anabolic steroids according to standard methods. Personally, I would prefer going straight to this, but if you prefer the above plan could be tried first.
Given that you’re comfortable with using anabolic steroids already, there really is no reason to not enjoy some fast gains right from the start in your comeback. It can be frustrating seeing regains be far slower than they would have been back in the day. I would go for it, myself.