Killed him first time... I think mostly he was easy because of my being a templar... I did a smite that wasn't resisted on him and it delivered 300 damage... even though it was near impossible to hit him with anything else.

Just used cleanse area alot with a combination of Wynn healing.... Only had my guy die about 1/4 into the fight but Morrigan with the Cone of Cold stunned him long enough for wynn to pop a rez