Spidey and Hulk ALWAYS get long lines, so go for them first. You should also try to hit the Hulk at night (it's a different experience) 
 
As far as the other rides go, the line lengths vary greatly. Every time I've been to IOA, the line for Dueling Dragons has been relatively short. However, on my most recent trip, the line went all the way to the castle entrance. 
 
I've also seen both very long and very short lines for Ripsaw Falls, Bilgerat Barge, Jurassic Park River Adventure, etc. Basically, expect that every line will probably be long, so if you see a short line anywhere, go for it!