in short, I would say no, with the Daystar lift you will not need a drop bracket. with 2" of lift in the rear, the panhard bar will still be almost completely parallel to the rear axle. I only needed the panhard drop bar when I went up to 3.5" in the rear, and even then, it wasn't absolutely necessary.
But with 2" of lift back there, I would actually say you shouldn't use the drop bracket at all.
I think Good Times would agree with me on this.