For DMML, AAP, AH and W-FOR, all structures are shown to have low multireference character on all diagnostics. All structures for Co-NHase, PTE and Mo-Cu CODH, as well as the triplet state of Hc and quintet state of CDO, have A λ values between 0.1 and 0.15, but are still low on the other three diagnostic tests. The A λ values are similarly low-mild for the singlet state of Hc, while the largest T 2 amplitudes, ranging from 0.098 to 0.196, also indicate mild multireference character. Of the 10 CDO structures across the singlet and triplet states, all have A λ between 0.11 and 0.14, five have T1 values between 0.02 and 0.05 and two have a largest T 2 am-plitude greater than 0.1. NiSOD is the most problematic, with almost all structures being flagged as having mild to moderate multireference character by all three of the A λ , T1 diagnostic, and largest T 2 amplitudes-only the reaction step from 4 to 4' (see scheme in fig. ) in both its possible spin states can be considered to have low multireference character. Removal of the structures flagged on three diagnostics leads to four reaction steps being cut from CDO and ten from NiSOD. The remaining number of data points in each reaction are listed in the final columns of table 2, and the steps included in the final set are labeled in fig. . We note that the four steps shown for CDO (fig. ) are modeled in three different spin states so there were initially 12 REs; two steps were cut from the singlet state (1RE3 and 1RE4) and two from the triplet state (3RE2 and 3RE3).