You can reduce the number of retracts by connecting the cut lines. It is done with the cut option parameter lace_option. Lace_option should be set to curve_connect or one of the other connect options. Different parameters appear for different cut types (surface machine, etc) so you may need to also experiment with scan_type, cutline_type, cut_type and cut_direction. Disconnected trajectories, etc will still produce retracts.