Hgh and insulin can be used year round. Cruising and blasting vs cycling will help keep gains. More time on = more keepable gains.

Once you come off everything completely you will lose size unless your very genetically gifted. Even then, nothing compares to being on blast. If you must come off, Keep your calories up and always lift with the most possible weight and intensity. Bro science isnt always wrong lol.

I think long term hgh is the most permanent gains. My hands and feet even grew.