Luke,
I think you're talking about the end of the second big slab that ends in a 2.5-3 foot drop. I have rolled it on both 26" and 29" wheels, but it's easier to manual or jump off. You can work up to it by riding across the first big slab and making a left at the end of it, dropping you out towards a boulder with a steep slab on the end of it. That is a more straight forward roller that will be good practice for the one at the end of the second slab.
Good luck and have fun.