Both limitations can be tackled by using post-Hartree-Fock methods like complete active space self-consistent field (CASSCF), which furthermore provides access to the individual spin state energies. CASSCF captures the multiconfigurational character of the orbitals, with dynamical correlation effects introduced through perturbative theories like CASPT2 or NEVPT2. While the orbital energies remain unknown for the CASSCF wavefunction, Hartree-Fock orbital energies can be obtained. This implies that a multicomponent fitting procedure can evaluate the ferromagnetic and antiferromagnetic components of individual coupling paths. However, certain quantitative limitations will remain since correlation effects are included only indirectly in the underlying orbital basis.