Optimal tomographic DV selection for the reference setup with a smoothing radius of 2$\stackrel{\prime }{.}$34. Main panel: Colored dots show the normalized FoM for each HOS at successive iterations of the greedy algorithm, descibed in Sect. 5.1. The FoM for each statistic is normalized to its full-tomography value. The colored crosses indicate the iteration where the 1% improvement threshold is reached; bins beyond this point contribute negligible information and were discarded. Horizontal lines mark reference configurations: non-tomographic (dashed), non-tomographic with merged bins (dash-dotted), and non-tomographic with two-point-like setup (dotted). Only κ-1PDF and κ-MFs are shown as representatives of one-point and topological statistics. Right panels: FoM contribution from individual tomographic bins shown for κ-1PDF and κ-MFs, with the most constraining bin highlighted in black.