As stated previously by Alagen, he's only one arrow up now, and NOT for AQ1, but AQ2. I soloed him at lvl 22 (conjurer) as well. He hangs out around the Caltorsis Ruins just east of the Oracle Tower and the Oracle Tower Station. I used lvl 12 tank pet, Adpet III, so not that hard. Good luck! :)
used in aq1 for conjurors.new update has him at3^^^, which is really lame since aqs'should be a personal journey not a group event, none the less he is a hard kill for that level, and a group is needed. took one 20th lv conj. a 22 or23 lvl tank , and a visiting low 20's necro to wipe him out.