As discussed in the FE study, global hybrids are not capable of capturing the binding interactions of the benzene excimer. Poor performance of global hybrids is consistent with their inability to accurately describe the CT, exciton coupling and dispersion interactions inherent to excimer binding. The long-range correction in CAM-B3LYP reduces the overestimation in r e compared to its uncorrected counterpart B3LYP with an improvement from a deviation of 0.18 to 0.12 Å (central panel in Fig. ); however it also worsens the description of D e (2.97 kcal/mol underestimation for B3LYP vs. 5.08 kcal/mol for CAM-B3LYP). Double hybrids yield an improved description of interaction energies along the dissociation curve, with B2GP-PLYP being closer to the reference than B2PLYP (central panel in Fig. ), both of which underestimate D e by 1.66 and 2.29 kcal/mol, respectively (12 and 17% error). Double hybrids provide a more balanced description of the excimer binding than global and RS hybrids. This improvement is consistent with benchmarking trends of double-hybrid robustness for excitation energies and absorption spectra due to their perturbative correction. Improved performance by DHDFAs additionally parallels the finding that only double hybrids were able to properly describe an exciton-coupled ECD spectrum, for which WFT methods had to be applied earlier. However, as recently re-emphasised, global double hybrids still fail to correctly describe CT excitations. The combination of range-separation and perturbative correction improves the description of the benzene excimer dissociation energy curve, giving the curves closest to the reference at all intermolecular distances (right panel in Fig. ). The assessed RS-DHDFAs, ωB2PLYP and ωB2GP-PLYP, improve upon their uncorrected counterparts, with the former underestimating D e by 0.58 kcal/mol (4% error) and the latter slightly overestimating it by 0.25 kcal/mol (2% error). Close comparison of RS-DHDFAs with the reference interaction energy curves of the benzene excimer display potential to corroborate claims of their robustness for local-valence and long-range excitations. . In summary, it is observed that, for the benzene excimer, the description of binding is improved by climbing Jacob's Ladder with rung-five functionals showing considerable improvement over those belonging to rung four (see Table for the Jacob's Ladder classification of each assessed functional).