LASSIS is designed to qualitatively reproduce the corresponding CASCI calculation at reduced computational cost. However, unless one extrapolates the size of the active space to the FCI limit, some post-CAS calculation is required to achieve quantitatively accurate predictions of state energies and potential energy surfaces, as for all active space-based methods. Here we invoke multiconfiguration pair-density functional theory (MC-PDFT), which can be combined straightforwardly with any wave function ansatz to compute the total electronic energy of any arbitrary state, which include dynamical correlation effects, provided only that the 2-RDM is available. Previous work on LAS-PDFT showed that PDFT itself can recover some degree of interfragment interaction omitted by LASSCF, if it is weak. Here, we will show that LASSIS-PDFT reproduces DMRG-PDFT sufficiently closely on a variety of systems with local strong correlation. These include iron-sulfur dimers, Kremer's dimer, and the triiron oxo-centered complex explored in Ref. 19.