my advice is to set your protein at around 1.5-1.8g per lb of bodyweight, and have a healthy amount of fats (50-70g range) and keep those macros the same throughout your prep. Then set your carbs at a healthy starting point (probably close to 300grams, will probably be less on training days without post-workout nutrition). Keep a close eye on your strength and bodyweight. Weigh yourself in the morning on empty to make sure you arre not losing more than 2-3 lbs MAXIMUM per week. If you are losing faster than this or your strength is dropping abnormally fast, you need to add some more carbs in or add in a mild carb-up day. If your not losing fast enough, then either pull out some carbs or add in some cardio. I personally add in an extra two days of cardio first, and then once i plateau in weight loss again, i pull more carbs out, and switch back and forth between these two adjustments, thsoe are the only two variables I change during my prep, unless of course that is still not working, then I may drop fats a little.