With that much lift, you could easily go with a 33" tire but the factory wheels will max your tire width to 33x10.50 which is not a real common tire size. With aftermarket wheels which have less backspacing, which means the wheel stick out a little further, you can go with 33x12.50 tires. If you add a 1" body lift, you can easily run 35x12.50 tires with aftermarket wheels.
The reason your factory wheels limit your tire width to around 10.5" is because they have 5.25" of backspacing which positions the wheel into the wheel well so far that wider tires will rub their inside sidewalls on the suspension. Aftermarket wheels have less backspacing so wider tires can be installed. Hope that helps.
P.S. This is how a wheel's backspacing is measured. The yellow tape measure is measuring the backspace dimenstion.