well jay everyone has some great bodyparts/some that need work/some that need a lot of work,,,it would be easy to say more reps/more volume/more exercises will do trick and maybe in the begginiing of attacking a weaker body part yes but when that ens u need to do something different or outside of the box.now u like low rep training thats fine if your chest say needs fine tuning do ir beginning week low rep /heavier weights,come back end of week and change exercise's and incorporate more cables/machines and do 12/15 reps with emphasis on squeezing the pecs.for me low reps for pecs 6/8 and some 10/12 with flyes cables but chest responds lower/heavier weight ,,now my delts are different higher reps and some supersets combo's work ,i do delts too heavy low reps i get nothing,tris i go heavy but high reps 10/15 ,,back heavy low reps mostly ,see every bodypart does not follow blueprint you want it too or imagine ,,u go by feel and follow it from there till u hit it right.good thing u have nothing to lose till the next workout and then u can change it up till it feels right,ur always getting something out of your workout,idea is to get the most out of the bodypart ur training and not the other muscles involved around,,like chest say pecs should carry brunt load and pump and tri's and fr delts should not be primary muscles getting worked/developed my training partner has this and has 'pancake'pecs do to it...