with global as well as range-separated hybrid functionals, algebraic diagrammatic construction to the second order (ADC(2)), and coupled-cluster with singles, doubles, and perturbative triple excitations (CCSD(T)). Their performances were generally assessed by comparison with available experimental data on binding energy and intermolecular separation. Rather expensive high-level calculations (MP2, CCSD(T), DFT/MRCI, multiconfigurational quasi-degenerate perturbation theory)