The best mass and strength builders are - Weighted Dips, Pull ups close underhand grip, Close grip bench presses,
The best isolation exercises according to EMG testing was preacher curls for the biceps,
Lastly that just leaves the inner head of the triceps and outer-head of the biceps, so overhead DB extensions , and hammer curls
Forearms - Strict isolated form, Wrist curls and wrist extensions,
This is fact^^^^^^. This will show you the difference between big arms and HUGE arms..
Get them big then worry about shape/details..