Here's a little something that some of you may not have known, and this little bit of information can help, depending on the player.
During the dialog with the 5 of them, they tell you that one of them swallowed a charm to prevent you from turning into a dragon and flying away, if you single out the person who swallowed it (his name starts with an 'M' I think...) and kill him, for the first and only time in the game, you'll be able to kill ground units in dragon form, of course they're Wizards and Rangers will still be able to hit you as a dragon, but it should even the odds a little.
I hope this little bit of info helped you guys who were having trouble with this a little more.
