Coronal models of Proxima Cen (left) and AU Mic (right), combining data from XMM-Newton, EUVE, HST/STIS, and FUSE. Upper panels: emission measure distributions (EMDs, thick line). The thin lines represent the contribution function for each ion (the emissivity function multiplied by the EMD at each point). The small numbers indicate the ionization stages of the species. Lower panels: observed-to-predicted line flux ratios for the ion stages in the upper panels. The dashed lines denote a factor of 2.