Spherically averaged PS for a 4° ×4° [CII] mock survey subdivided in four tomographic scans of 40 GHz bandwidth each centered at z = 3.7, 4.3, 5.8, and 7.4. The averaging takes place in the Fourier space in k-bins of Δk = 0.034 Mpc⁻¹. Predictions from our rTNG and AM models are shown by dashed and dotted lines, respectively. Lines are color-coded according to the used SFR-to-L_[CII] relation, blue lines for A20, green lines for L18, and black lines for V15. L18 is also plotted at z = 7.4 including the contribution of 3 × 10⁹ − 10¹⁰ M_⊙ halos for our AM model (faint green dotted line). The red lines are the power spectrum of the instrumental single-k-mode white noise (labeled as WN), P_WN, of the scheduled FYST LIM survey. Gray areas cover the scales at which for our various models. This illustrates the transition from clustering-dominated to shot noise-dominated scales. Predictions from Chung et al. (2020, turquoise line) are also shown for comparison.