How did you guys kill Auntie?
I did it in two attempts. On the first one my party was lvl 4 (Human Paladin, Shadowheart, Laezel, Gale), mostly with expended spells, and not in full health. I hit her hard twice, took her to about half health. She cast invisibility. I cast water on top of her. I hit her once more, she teleported away. By that time the redcaps had caught up with me and the melee ones were fucking me up due to bloodrage giving them 3 attacks.
On the second attempt I had restored everyone to full health with a short rest, buffed them with Aid, Bless, and I had Laezel use drow poison on her greataxe. This time I managed to kill Auntie before she could teleport, because I dumped my two melee chars damage on her, plus a magic missle cast from scroll. Also I had Laezel debilitate her with some of her fighter abilities, so next time I was going to hit her she was on prone and Laezel had 100% hit chance... The redcaps weren't too difficult to deal with after that the spiritual weapon I summoned also helped.
All this is happening on Balanced difficulty BTW.
Anyway, I have a lingering feeling that I cheesed the combat by prebuffing, and I'm curious how did it go for you?