I'd go one step further and saw most of the material off as close to the final line, then finish off with the dovetail cutter, the dovetailed cuts usually have a large bulk of material to remove between the tails, faster and easier with a saw than with a mill...don't ask me how I know :whistle:
Sawing will get rid of the bulk quickly. Plus, you can use the bulk pieces to make other small projects.
I utterly love making chips, but I just hate wasting material.)