I am AA 16. Yesterday I went into Devil's Battlefield for the first time. Three attempts at Gatesmasher:
With Bard 12 hireling -- hireling died, I escaped
With Barbarian 16 hireling -- Gatesmasher down
With Bard 12 hireling again (now that I know what I am doing) -- Gatesmasher down
Does this count?
One question: Does Gatesmasher have an anti-healing aura? When trying to heal or drink a Remove Curse pot, I got a "Your spell fails due to the presence of quell" message, or something like that. But I did not see any quells.