Band engineering strategies are widely employed to improve the thermoelectric performance of materials. Band degeneracy, in particular, can enhance the PF by increasing the Seebeck coefficient and thus the ultimate thermoelectric performance. Band or valley degeneracy refers to the case where multiple bands have identical (degenerate) or closely matching within a few kBT (effectively degenerate) energies. This can happen when different bands have minimal (or no) energy difference at the band edge (termed orbital degeneracy) and/or when multiple pockets of the same bands in the Brillouin zone are (effectively) degenerate, often due to symmetry equivalence via the combination of crystal and orbital symmetries (termed k-point degeneracy).