I do preacher curls with dumbells , incline dumbell, hammer curls dumbell or rope. I also rotate weekly with cable one arm curls, spider curls, ez bar.Can you give us a sample workout?
Watching random dudes at the gym, most guys have a tendancy to do the saaaame movements on the same plane over and over again.
Just training EZ bar curls with their bicep out in front, thennnn DB curls on the same plane over and over again.
For arms, you need to train in different positions (triceps are just like this...there's a reason you cant build amazing tris JUST doing pushdowns)
Incline curls, your arms behind you. DB curls, your arms in front. Preacher, where you're locked into a certain position taking shoulder movement out, etc.
Triceps i rotate with rope push downs, close grip bench, skull crushers, overhead dumbbell raises, cables push downs, and dips.
I do 10-12 rep range on all.
I usually do 3-4 different exercises for biceps and triceps.
9-12 sets each total.