Have an arms only day.
- EZ curls heavy as you can even if it means using momentum
- Prone DB curls strict
- Skull crushers or close grip bench
- Over head rope extesion come out wide at the end
- Narrow grip tri push downs
- x2 normal sets and x1 triple drop set 1 arm at a time cable curls with the stirup handle
- x2 normal sets and x1 triple drop set 1 arm at a time over head cable extensions elbow pointing at the roof with the stirup handle
Then eat as much as you can, and force some weight gainers down as well and make sure you get enough sleep, maybe do a few lighter weeks on all other body parts.