In this section, the interaction energy curves for each excimer across a range of TD-DFAs are analysed relative to the reference of SCS-CC2/CBS (3,4). The chosen range of TD-DFAs is based on either popularity, established accuracy for singlemolecule excitations, or novelty; they are: B3LYP, PBE38, BH-LYP (global hybrids), CAM-B3LYP, ωB97X (RS hybrids), B2PLYP, B2GP-PLYP (global DHDFAs), ωB2PLYP and ωB2GP-PLYP (RS-DHDFAs). These functionals occupy the top two rungs of Jacob's Ladder with varying exchange-correlation components and FE percentages, with and without RS, as detailed in Table . For all the dissociation curves discussed, the values associated with the minima, i.e. D e and r e , are listed in Table . Dissociation curves are shown in Figs. . ωB97X interaction energy curves are not shown here, but instead in Fig. † due to observed problems with getting smooth curves that could not be fixed with any of the usual convergence techniques. ωB97X will however be discussed as part of the overall statistical analysis (Section 4.4) with the values based on the actually observed minima under the assumption that they are good approximations to the true minima. Hereafter, deviations from the reference and associated percentage errors will be given as absolute values. Indication to underor overestimation will be discussed qualitatively.