OK, random thoughts:
Craft(Poison-Making), Minor creation, etc for a poison setup.
Minor shapeshift together with polymorph are never wrong.
Fiery burst? They get at least one [fire] spell per level, except 5th. Retrain it later.
Martial Study for the intimidate skill + imperious command.
Martial Study x2 for white raven tactics.
Knowledge devotion is good, but with your BAB you ain't gonna do much.
Leadership is a given.