I snuck into the room, used Cloak and Dagger to Teleport to the center of Orivand and his mages, Whirlwind+Battle Stomp = all 3 knocked down. Pretty easy to mop up from there. I'm using Lone Wolf, so YMMV if you don't have enough damage to clear the armor on turn 1 or if you lose initiative to Orivand.
