I never realized that she would go in there for any reason other than your prompting the gobbos to bang their wardrums?
I will say that other than potentially losing out on the high dollar gold chest that is tucked away in there, having your mage hurl a fire bolt into the room causes one of the best explosions in the game and usually takes all three of them out immediately or at least knocks down the life of any survivor so that any attack will then polish them off!
I usually sneak in there and steal the gold almost as soon as I enter the Shattered Sanctum in order to avoid missing out on the bounty and then at whatever point suits me, blow that room to kingdom come. Satisfaction!
