1 INTRODUCTION  
2 INPUT CATALOGS  
2.1 Lensing sources  
2.2 COSMOS catalog & DES griz  
2.3 Simulated sky catalogs  
3 PHOTOMETRIC REDSHIFT ESTIMATION  
3.1 Bayesian Photometric Redshifts (BPZ)  
3.2 Directional Neighborhood Fitting (DNF)  
3.3 Binning and initial $n^{i}(z)$ estimation  
4 VALIDATING THE REDSHIFT DISTRIBUTION USING COSMOS MULTI-BAND PHOTOMETRY  
4.1 Methodology  
4.2 Sample variance contribution  
4.3 Photometric calibration uncertainty  
4.4 Hidden-variable uncertainty  
4.5 Systematic errors in matching  
4.6 Combined uncertainties and correlation between redshift bins  
4.7 Standard photo $z$ performance metrics  
5 COMBINED CONSTRAINTS  
6 USE FOR COSMOLOGICAL INFERENCE  
6.1 Dependence on COSMOS2015 redshifts  
6.2 Insensitivity to $n^{i}(z)$ shape  
6.3 Depth variation  
7 CONCLUSIONS AND FUTURE PROSPECTS