It was once commonly used during PCT in the belief it will aid testosterone restoration, however this is flawed due to its mechanism of action. The drug mimics the effects of LH in the body, stimulating the Leydig cells to produce testosterone in the testes . This can be fruitful in rectify existing, or avoiding testicular atrophy on cycle. It will not aid the process of recovery in the post cycle phase however, as the drug will bring about heightened oestrogen levels due to the greater aromatising of the testosterone being produced in the testes , thus bringing about greater inhibition of the HPTA .
The most commonly used AAS in medicine are testosterone and its various esters (but most commonly testosterone undecanoate , testosterone enanthate , testosterone cypionate , and testosterone propionate ),  nandrolone esters (most commonly nandrolone decanoate and nandrolone phenylpropionate ), stanozolol , and metandienone (methandrostenolone).  Others also available and used commonly but to a lesser extent include methyltestosterone , oxandrolone , mesterolone , and oxymetholone , as well as drostanolone propionate , metenolone (methylandrostenolone), and fluoxymesterone .  Dihydrotestosterone (DHT; androstanolone, stanolone) and its esters are also notable, although they are not widely used in medicine.  Boldenone undecylenate and trenbolone acetate are used in veterinary medicine . 
Most of my recommendations for considering yourself an advanced steroid user are self-explanatory. Basically, my worry here is that no matter how many cycles you´ve done, if you´re losing half of your gains from each cycle, then you have a lot of work to do to figure out what you´re doing wrong after your cycles end. There´s really no way around that fact & if you´re not keeping half of your gains, then something is going wrong when you end your cycles. Before you jump into an advanced cycle, with multiple compounds and drugs, you need to get your post cycle in order. If you´re losing more than half your gains from every cycle… then something isn´t in check. You aren´t an advanced steroid user you´ve just used a lot of them. But, if you keep most of your gains from each cycle, and meet the other 3 criteria for being advanced, then this cycle is for you!