i am currently on a cutting phase. i am at about 18.5-20%bf. i am trying to get down to 9-10. my diet currently consists of 3200 calories, 40%protein,30%carbs,30%fat. should i be taking anything to lose the least amount of lean mass as possible. maybe mag 10, or its little brother 4 AD-EC? can someone give me some advice? And how long would it take to get down to the bf% from where i am now?