Q175: What are the most likely ways a level 9 party (Artificer (all-round, no real specialization), Conjurer/Malconvoker, Psion (Telepath) and Rogue (ranged)) can beat (and I mean kill it deader than dead, not just 'bypass the encounter' or banish it) a Balor? Cheese is probably necessary, but I'm really just looking for suggestions, tips, tactics and strategies right now.
EDIT: Dust of Sneezing and Choking is banned, unfortunately...