We recently used the ab initio embedding scheme called the effective-fragment-potential approach 609 combined with the aforementioned δ -CR-EOMCC (2,3) calculations, the properly calibrated DFT and TDDFT methods to optimize geometries, and the DFT continuum solvation model based on the solute-electrondensity approach to accurately model photochemistry of the strongest known super photobase abbreviated as FR0-SB in various alcohol solutions. This would not be possible without mixing DFT and TDDFT with embedding and ab initio approaches.