Out of curiosity, is there a reason you're using the names Baham and Tiamus? Bahamut and Tiamat are actual figures from Arabic and Babylonian mythologies and it's slightly jarring to see names that are close to but not quite theirs on characters that have the same roles as their D&D equivalents. If you're trying to distance yourself from the D&D cosmology I'd recommend picking entirely new names (or basing them on their original myths). Otherwise, it might be easier to just use their proper names.