From what I have read , and I have read everything I can , then Chapin is wrong in one thing : Charisma has no effect on the length of a charmed creature. Many people have done tests on this and they can't find any affect from Charisma.
Also , on the subject of quadding , ME is a great zone for this , Gorangas and Toilers. In the PoN , you can also quad the Ravenous Nightstalkers very easily as well.
For the RN's in PoN you should have a mana pool of 4000+ cause you will use a lot of mana.
Charm kiting is great in PON , charm a Raven and go to it.