Creatine shouldnt be relied on as a muscle builder. How do u know your body needs it. People who buy off the shelf crap like Maximuscle ( who are crap) have no idea what affect it might have on them. the best and first part of a good diet is to take a Live blood anaylsis and electrodermal. it can find intolerances in your blood in which u may not even have known about. and to see how your body reacts with certain foods like wheat, caffeine, tourine, gluten etc. + many more things.
A good sensible diet with enough calories (min 3000) and a good mix of strength, muscle endurance and hyper trophy sessions changed every 2 months , 3 times a week will be more than enough to achieve most goals. disipline is always king !!
Muscle building needs minimun cardio to get size. But we are all different and all unique in our blood system, metabolism, in tolerances and diet so there will never be a 1 for all exercise/ diet.
rant over