Protip: If a solo encounter is pwning your ass in AoC, there's something you missed. It's those fights that you barely lose at the last second that should worry you about builds or items.
An elite 85 boss in Isle of Iron Statues can be defeated solo thanks to the thingies they put there, you just have to find the trick for this one. This one has a pretty hard to find trick though.
extratip: Have you ever wondered why priest corpses aren't disappearing?