Maybe the fastest way to cut grade in a single pass with an excavator?

I rarely ever do any dirt work any more. I used to dig basements, foundations, do driveways, ponds, etc, etc. At the time I got out of general dirt work, I could usually set grade by eye within 4"-6" or better. That was about 20 years ago and most of it was done with the PC200 or the 550G back when I had that. When I did drop the dirt work, I had purchased a Bullseye receiver and a 2 axis rotary laser which I still keep to this day for my own rare projects.

I set out a pad for a 5th wheel...

Maybe the fastest way to cut grade in a single pass with an excavator?