If interested I have an article on Mesomorphosis with a title something like, an integrated drug, training, and nutrition plan.
In it the results of “Jim” (by the way, a succesful doctor today) are reported along with the exact training program I wrote for him, which indeed was intended to work with the steroid cycle plan.
I haven’t read it in years – not sure if I’ve read it at all past the 1 year or so point after writing it – and might not do the same today in terms of training, but it wasn’t ridiculously poor anyway.
In that situation though the lifter didn’t have any kind of particular training program that was working for him: just was doing this and that. Also some things about it were designed for his particular preferences or around particular limitations. It was never intended to be an ideal for anyone else or for an example “average” target audience person.
If already having a well developed program and wanting to stick with it, then certainly it’s not necessary to abandron the program. The “on” weeks can be in the part that is expected to offer the best hope for muscle gain, and depending on what the planned volume is, it might well be ramped up some. The first “off” week should be reduced volume and should maintain relatively heavy weight. Other than that a great deal of change from a long term program that works well, really isn’t necesssary.