I'd go with the weights. If it's what I think it is, I'd spend time working on my triceps if I were you because nobody wants bat wings
With your arm behind your back (elbow pointing up) grab a dumbbell and curl it up so your hand comes up top and do 3 sets of 10 on each arm. That's pretty basic and hard to mess up or anything.
-Rudey
--I prefer the skull crushers!