In a perfect world I'd have enough money to go out and get an offset grader blade and rake to do a better job.
When my tractor was delivered, my dealer didn't have the box blade I ordered at the time. Since they knew I needed to do some urgent cutting of a driveway they loaned me a grader blade. FWIW, I found this was a terrible implement to use for cutting a new road surface. It only shaves the top and redistributes loose material; there's really no "removal" of material (if that's what you're trying to do).
If your road was already in & graveled, I'd say the grader blade might be just the ticket for dressing the surface, but when dealing with the
dirt base of the road, I was super frustrated with it.
Even though my dealer gave me some line like "oh, the grader is easier to use than a box blade anyway, we'll just loan you that", I found that once I finally got my BB, the thing was so much better to use for that phase of road construction.
The proper tool for the proper task...
EDIT: Missed the part where you mentioned an offset grader. In fact I was loaned a dual edge road grader... THAT thing was all wrong for the initial cutting of the base. I stand (a bit) corrected.