In concrete cutting, I originally got that idea from a job I did in 1999 with a Wirtgen DC1900. We had to excavate/remove 5 miles of sidewalk from a Golf course in Southern Georgia.
The concrete depth was roughly 6 - 7 inches, at first we cut it on grade trying to take it the cutting drum the full 6 inches on BOTH sides of the milling drum. The results were difficult, chunky material that wasn't being broken down. The load coming off the ground was hard the conveyor and the width of slab left behind to remove was going to be even more of a problem.
Instead of running both sides of the drum at full depth, (6 inches) we ran the right side of the drum at full depth and the left side at around 2 - 3 inches leaving a "bevel". That also worked in the application I mentioned above.
Please let us know how your job turns out.
The Sandvik teeth rep was by one of our jobs last week and left us some teeth that I'm really impressed with. They have a pretty good selection of teeth which seem to last quite well in concrete.