The chosen exchange-correlation functionals uniformly predict a weaker binding with absolute errors of D e ranging between 3.65 and 16.53 kcal/mol (13-58% error). r e is largely overestimated with absolute deviations ranging from 0.01 to 0.33 Å (0.3-11% error), the exception being PBE38, which underestimates the distance by only 0.01 Å. The fourth-rung functionals behave differently between naphthalene and benzene excimers whereas fifth-rung functionals exhibit similar performance trends. For the naphthalene excimer PBE38 offers an r e closer to the reference than the BLYP based functionals, however underestimation of D e is on par with other DFAs belonging to this rung (46% error), consistent with results from our previous FE study in Section 4.1. B3LYP binds the excimer with a D e comparable to those of other global hybrids (48% error) while its long-range corrected counterpart, CAM-B3LYP, again improves the description of r e (reduced deviation from 0.33 to 0.20 Å) but yields D e akin to the global hybrids (53% error). While the relative trends between rung-four functionals differ between benzene and naphthalene excimers, the finding remains that global hybrids provide the worst results.