One of the things that I've done in a my Powerlifting to Bodybuilding switch was to slash and burn diet, then add cardio, then start adding in more carbs, then adding more cardio, then start adding in more protein... all whilst turning the food sources cleaner and cleaner and ticking my calories upwards.... so I've managed to cut back to nearly contest levels of fat and I've started putting old muscle back on (I stopped rowing for deadlift accessories like 2 1/2 years ago) whilst still being pretty low on calories (ive stopped counting at this point, and fat continues to drop)