The 800 gp belt of tumbling should still be an option.
For scrolls up to 2nd level - wind wall is a 2nd level spell for a ranger, in case someone goes for an archer.
... (By the way, one of the Oracle players asked me about how I'd make an Oracle well before the Bard player did, and I told him the Waves suggestion that was mentioned in this thread.) The plan, which, by the way, can be destroyed with a simple Area of Effect spell like Burning Hands or something.
Cool -- glad my various suggestions have been at least a little bit helpful. :D