In my experience, If I eat less while on test only , I do get stronger and put on some size but nothing really all that residual. Meaning when I come off, I don't keep much strength or weight. Now when I up the cals whether on or off, I'm stronger and bigger. So my advice is at bare minimum you need to increase the protein while on because all the gear in the world won't create new muscle without nutrients to build muscle with.
Best option, just eat and adjust diet for your goal. I eat like mad while on and through pct. Then taking off any unwanted body fat is pretty easy with the new muscle acting as metabolic fat furnaces.