You could pick up a few levels of Spelldancer (magic of faerun) to go along with your Ranger and Spelldance to Persist your spells. Of course, this requires setting feats on fire, but you get one of them automatically (Endurance). Unfortunately, it'd be Ranger 11 at the earliest before you could enter it. Of course, you'd need some sort of multiclassing to meet the Perform checks, anyways...