She can be taken down if you have two, or more, accounts by either cross healing or you can trap her near the stairs with a paladin/bandage type and having a disco mage healing you from outside the stair area.
She has no slayer and takes some time so once you have a rhythm, bring a book. I finished her a few hundred times, the loot sucks and the drop rate wasn't great either plus the only item worthy is the shield.