Creatine while cutting

Three questions: First, is there any reason not to use creatine while in a lower-calorie cutting phase? Second, since MD6 contains caffeine, should I avoid using MD6 while using creatine or is the diuretic effect of MD6 insufficient to be of concern? And third, is it correct that creatine should NOT be used in a diet as extreme as the fat fast because of the diuretic effects of the diet and the lack of carbohydrates to properly deliver the creatine?

I tried loading several times on FF and got nothing. Without the carbs I don’t think it works (IMO).