Do you have the toe of the slope sketched already? If so I would suggest turning it into an alignment. Once you have it as an alignment you can make use of a generic sub-assembley like link offset and slope to create the toe of the slope, then use link slope to surface to create your daylighting at a 2:1. I just tossed together 1 side of the assembley, it should look something similar to this. Of course if you don't have the toe of slope you can toss my idea right out the window.