For me, I'll use faster response balls (Dream and Dream On) on patterns longer than 43 feet, because I need to know the ball isn't going to puke in the mids. On that type of pattern, I'm usually into the puddle, so I'll use surface (On) when the backends are fresh, and ball across to the Pearl when the mids start to go and the backends tighten up a bit. The further right the pattern forces me, the slower response the ball. If I'm bowling on 32 feet of oil, urethane or much slower response balls are a must. So a Booyah, Darkness, or X would work.