We sample different cosmologies according to the current (DESI DR2+Planck+Union3) best-fitting probability distributions for w₀, w_a, Ω_m, compute the theoretical distance moduli and compare them against the best-fit cosmology (black dashed line). On the left panel, we can see how measuring additional SNe Ia at redshifts z ≈ 0.55 would currently be the most helpful for constraining dynamical dark energy. On the right panel, residuals are anchored at z = 0.3, for example, by an additional high-precision measurement. Now, low-z SNe become the next best place to measure. So these plots highlight not only that there is an optimal redshift to measure at, but that a stronger medium-redshift anchor is required to make additional low-redshift SNe more informative.