In the previous section we have shown that LES enhances the transferability of ML DFAs. Yet, κMP2 correlation has been the proxy reference in place of its exact counterpart. In this section, we use our regularized PT2 based generator for a NN based combination of the spin-resolved κMP2 energy densities to bridge the gap between κMP2 and true correlation energies. For this purpose, our ML model for correlation energy densities is defined as: