I know a former 90s pro who has done exactly the same as Dorian and he has his steroid courses in them.
His last pro show was 300mgs test prop and 200mgs tren A a week, no diretics or fat burners.
Its in his journals, all his courses are in them, he wouldnt write down something that wasnt true.
I would imagine Dorians were not that different , more probably but I know someone who talked with Dorian backstage at the 88 British when he got his pro card, he was only taking test and 2 parabolon a week back then..