My latest attempt involved a little game editing using Shadow Keeper. What I did was max Aerie's gate spells to 12. Then, I let everyone except Aerie out of the party and she cast Prot. From Evil 10' Radius.
She cast Gate next:
Then she cast 3 more Gates. Is it just me, or does Aerie look like she's laughing maniacally in the last screenshot?
Notices the dead bodies in the next screenshot.
Aerie exhuasted all of her Gates. The survivors were Minsc, Jaheira, Mazzy, Solaufein, Valygar and Korgan. Everyone else died, even Aerie who was still in my party. Her last two gates cast Fireball and she accidentally got caught in the blast.
My next attempt will be everyone in my party but me VS the rest of the NPCs. If I have time to that is.