Differential sensitivity at 5σ confidence level for 30° (solid line) and 50° (dotted line) zenith angles evaluated on testing on-axis point-like gammas and diffuse protons. Line colors represent different regimes of observations. For the sake of clarity, only results for SST-1M-1 are shown in mono, as both telescopes are very similar. We note that in contrast to stereo, the additional condition requiring at least ten excess events does not affect the last energy bins for the 50° zenith angle in mono, as the number of excess events is satisfied by the 5σ condition only (see Section 5.3 for more details).