Although the SRC functionals prove to be very accurate for LR-TDDFT calculations (and thus for TDKS calculations), this appears to benefit from significant error cancellation as these functionals perform exceedingly poorly in ∆SCF calculations. As such, we have begun to shift our emphasis back to functionals such as B3LYP that perform well the ∆SCF approach. LR-TDDFT calculations with B3LYP are often significantly shifted with respect to experiment (by > 10 eV in some cases), yet relative peak positions and chemical shifts exhibit accuracy on par with many-body methods. This observation is consistent with ∆SCF results. Relativistic corrections are not included in this work, as these are estimated to be ≈ 0.5 eV for oxygen and even smaller for lighter elements.