As technology advances and distributed energy resources (DERs) become more common, electrical microgrids (MGs) will play an increasingly important role in future distribution grids. Radial distribution systems (RDS) are prone to problems, particularly after major natural disasters. To assess RDS resilience, a comprehensive approach is required. This paper proposes a novel approach that combines MGs and DERs with line hardening approaches to improve resilience under harsh operating conditions. It specifically integrates battery electric vehicles (BEVs), solar photovoltaic distributed generation (PV-DG), and battery energy storage systems (BESS) into a single IEEE 12-bus RDS. The goal is to improve the mentioned resilience metrics while also restoring all faulted loads. To optimize the system's objective, the group teaching optimization algorithm (GTOA) is used to determine the ideal PV-DG allocation. © 2025 Elsevier B.V., All rights reserved.