Metropolis Monte Carlo Tc for LTP MnBi from the Ouro TB2J exchange pair list (978 pairs, action 01a03a15-dcbe). chi-peak Tc ~425-440 K across L=6/8/10, vs mean-field bound 880.3 K; comparison vs Enkhtur & Odkhuu Sci. Rep. 15, 36792 (2025) VAMPIRE claim of 750 K and the ML Gate 0 estimate of 412 K.