FL130 standard, as is direct OCK at that time of night, especially on a PAN.
Most of Sector 20 (129.425) is over the sea, and extended vectoring can take place to save a 'holding' situation so that separation is easier.
One point, our bible states that the (standard) separation of 1000 ft must be maintained, but would you really only want to pass 1000ft BELOW a dumping a/c, as it doesn't state anything different???