I. INTRODUCTION

II. DES Y3 DATA  
A. Sample selections  
B. Sample comparison  
C. Tomographic binning and redshift distributions  
D. Survey area and angular mask  

III. FORECASTING METHODOLOGY  
A. Likelihood exploration  
B. Theory Modelling  
C. Parameter space and priors  
D. Scale cuts  

IV. SAMPLE OPTIMIZATION  
A. MAGLIM sample  
B. Flux-limited sample  

V. OPTIMAL SAMPLES  
A. Comparison on same tomographic binning  
B. Cosmological constraints from MCMC likelihood analysis  

VI. SENSITIVITY TO ANALYSIS CHOICES  
A. Tomographic binning and cross-correlations  
B. Galaxy bias  
C. Photometric redshift uncertainties  
D. Weak lensing systematics  

VII. CONCLUSIONS