Then in 2021, Casanova-Páez and Goerigk revisited this idea and presented a total of 14 new SCS-and SOS-based global and range-separated TD-DHDFs, some of which turned out to be some of the best TD-DFT methods for localised and long-range excitations. They also showed superior accuracy and robustness for singlet-singlet, doublet-doublet, and singlet-triplet excitations. As outlined in the previous section, the SCS-CIS(D) correction requires four scale parameters, while the SOS version only requires two. Those parameters were fitted on a set of ab initio excitation energies of small chromophores, which means the 2021 functionals were specifically designed for improved excitation energies. As the ground-state MP2 correction has no influence on these excitation energies, ground-state SCS/SOS-MP2 was not applied to those functionals. Consequently, the current implementation of those functionals does not give a correctly defined electronic ground-state energy, which poses problems for applications that rely on total energies of excited states. Based on our elaborations in the previous section, we therefore suggest the same mapping of SCS/SOS-CIS(D) parameters onto the SCS/SOS-MP2 ground-state contribution as for the wave function SCS/SOS-CIS(D) methods. Consequently, we apply the scale parameters from the indirect term to scale the ground-state contribution, which leads to the following expression for the ground-state SCS/SOS-DHDF energy: