the casters will stay back and usually cast 2 spells before they are pulled out of the village, usually a nuke and a dispel. Keep those right click items handy on the puller and keep a few crap buffs on him for that reason. The mobs are not difficult on single pulls and are doable on double pulls w/o chanter as long as the casters can be stunned to prevent them from healing.
Just remember to have melees with instill doubt not use it... we had a monk hit it by accident and bring back the whole village.. not a pretty site :(
I have heard that the Level 50 Magician Spell: Monster Summoning 2 drops off the Kobolds In Velk's. Just aking for confimation. Any info would be great thanks =)