bro everyone is different, one guy is saying he only does 2 exercises for biceps, but each time I have heard someone talking serious about building 20" arms and bigger, you have to work the arm from every angle and do crushing sets till failure, and personally I dont think 2 exercises is going to build mass, peak, cuts, shape, girth, hardness, and overall awesome arms! Bro weightlifting and body building is all about response, and once you find what lifts and style make your body respond and grow thats when you know your getting somewhere, a trainer cant figure it out for you, you have to figure it out yourself, it may take 2 years or 7 years, but when you have finally figured out what combinations and lifts you respond to then you can start to think about building quality size and shape.