ok this is just an estimated guess
but in consideration of this diet
300g CLEAN complex carbs
300g Protein (whey/casein - 60%/40%)
a training routine of one day lift, one day off, next day lift, next off
cycling workouts of all upper body pushing, all legs, all upper body pulling
for someone whose 21yrs old,
has been training for 5 years
average base genetics (a rather even split of ectomorphic and endomorphic traits)
how many mcg/day would you suggest would be possible to gain around 10lbs lean muscle and for how long?