Any rep ranges higher than 5 aren't worth ramping. The whole purpose of ramping is to activate then potentiate the CNS prior to stimulating it with heavier loads and/or thresholds. This simply won't work when attempting to "ramp" with higher rep ranges. The effects of fatigue when performing the higher reps outweigh the positive stimulation aspects on the nervous system.
If you want to get in the zone prior to performing lat/biceps exercises (which respond better to those higher rep ranges), your best bet is to either:
(1) Do some ballistic resistance band work or
(2) Do some explosive OL-based movement from the hang position.
(for biceps, one or two sets of drop-catch-lifts with a light barbell should do the trick (biceps flexed entire time as when performing constant tension curls) if you're only working on arms, for example)
What works really well for me is when I begin my entire lats/biceps workout with the following superset:
A1. 45-degree torso pulldowns to face with triangle grip attachment . . . Thibs highlighted this exercise here: http://www.T-Nation.com/strength-training-topics/418
A2. Power High Pulls (T-Nation YouTube video clip demo below)
Hope this explanation helps!