how about working your forearms to stimulate growth in the muscles underlying and supporting the biceps? Especially for the brachioradalis(sp?) muscle that starts at the wrist and ties end at the shoulder.
Sergio Olivia claimed that was one of the reasons why most BB’s don’t develop good arm size…they don’t work the forearms separately.
As a side note, chics dig well developed forearms, as much, if not more, than well developed biceps…probably because forearms are almost always visible.
Also, look at Chad Waterbury’s anti-bodybuilding hypertrophy program. It will give you an entirely different range of set/reps than you currently use. And, it will do so within a periodization schedule that changes set/rep schemes for the same muscle within a one week period.
Add his 100 rep program to the ABH program and you may have a winner!