Is there a faster way to generate tool path other than selecting each individual cut line?
You can try this in the 2nd tab of the 2d profile window. Usually works for me then I double check it is picking the sides of the cut lines correctly
When you get done sketching your part. Extrude it. I usually just do 0.25" but anything works. Then you can select the whole body in one click instead of selecting the perimeter lines (hope that makes sense). You can always delete the body and go back to the original if you want to modify it.