They can be defeated in many ways, such as using thief traps (little chessy but hey), priest spell blade barrier combined with sanctuary works(if you are high enough level), use the sling of everard (bought from joluv in copper coronet( you need the extra merchents patch, go to
www.teambg.com - i think they have it)
And some others i forget
help?
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Bristowe, Master Assassin