Balor

The Balor is one of the most powerful Tanar'ri in the AD&D game. This one is no different. It attacks pretty straight on, considering all the magical abilities it would normally have. The most dangerous attack is that is can cause Fear and does so about every 10 seconds during the fight. Set up all of your healers with 2 or 3 Remove Fear spells and a Protection from Evil, 10' Radius spell. Use the most powerful weapons you have, nothing less than +3 will harm it. Cast Remove Fear and Protection from Evil, 10' Radius on the party before clicking on the ladder along with Iron Skin and Stone Skin or whatever other protections you got. The Remove Fear should keep you protected once the fighting starts but keep a close eye on the characters and if that pink heart disappears cast another as quick as you can.