Each body part 1x per wk is very efficient, assuming you're hitting everything hard and intense, but even with this kind of split, your body will adapt IMO. My favorite training split is 4 on 1 off, so everything is hit 2x every 9 days. I'll use this split until I feel my body adapting and wearing out from the more frequent training sessions and then switch to everything 1x per wk, which comes out to 3 on 1 off, 2 on 1 off...once I adapt to that, then it's back to the 4 on 1 off routine. Seems to work well for me.
As far as the main topic at hand, I will typically back off things slightly right after a cycle. I do not mean I let my self get lazy, but the number of sets I do will drop down and any high rep sets that I might usually do will be put on hold for a while. I typically keep all my sets in the 8-15 rep range, but right after my cycle I'll stay in the 8-10 range. Once things are back in order I will go back to my regular routine be it if I'm on or off cycle.
Try keeping your training short and to the pont, keep the weights heavy, but your main focus should be to hold on to as much of what you gained while on cycle. after 4-6 wks of this type of training, you should be able to go back to your normal routine that you like.
Final note, keep eating plenty of food, but I would advise backing your calories down slightly, especially the carbs. Right now post cycle, your body does not have the AAS helping assimilate all the food that you were taking while on, so backing off can help with the way you feel. Carbs especially should be cut slightly, because too many carbs can really make you feel sluggish.
