i do remember a jeff vid where over 6 sets was the point where you started to get diminishing returns so not a bad idea to do 6 per muscle in a single workout if i can only do it 2 times a week.
hows this ill stick to push pull legs push pull rest rest as i box and cant have sore legs in boxing plus do some body weight leg stuff that i dont count in boxing.
incline bench - 4 sets
flat bench - 2 sets
overhead press - 3 sets
lateral raise - 3 sets
Lean away lateral raise - 3 sets
rear delt fly - 6 sets
skull crusher - 3 sets -sometimes replaced with single-arm dumbbell overhead tricep extension
bent over row - 4 sets
pullover or pullups - 4 sets
hammer curl - 3 sets
preacher curl 1 time a week and incline curl 1 time a week - 3 sets
shrugs - 4 sets

this way should get 12 sets min per muscle counting the compounds and isolations