Emulating the expert class is a good idea.
Another possibility is to give them 8+int skill points per HD (for them being outsiders) and give them all the class skills of the classes he has. They are gods, after all, and impersonate those classes. Corellon Larethian, for excample, is the impersonation of the elven fighter and wizard, and so he'll be really good in things like jumping and spellcraft, and should get figher and wizard skills as class skills for his outsider HD. A god of thieves would get all thieves skills, the god of magic everything a wizard gets and so on.