Measurements of the projected mass density ΔΣ for each lens redshift slice of the MICE mocks, where measurements corresponding to the different source tomographic samples have been optimally combined following the procedure described in Appendix C. Results are shown for four cases: using the spectroscopic redshifts of the sources (black points, fiducial measurement with perfect source redshifts), using the photometric redshifts of the sources but without a correction for the photo-z dilution factor f_bias (red points, photo-z dilution remains uncorrected), including the dilution correction (green points), and using the redshift probability distribution for each source tomographic slice (blue points). We only include individual source-lens pairs with z_B >  z_l in the measurement. We find that, other than for the case where the f_bias correction is excluded, both the point-based and distribution-based photo-z dilution corrections produce ΔΣ measurements which are consistent with those obtained using the source spectroscopic redshifts.