A Wicked Kendragon
Looking at those numbers it really is baffling why you'd need to halve the xp for the treasure. Maybe it's because it's such an early module, but now it just makes the Tomb look cheapskate. Especially when so few parties ever get the full price.Treasure xp is half the normal, (1xp per 2gp value), so without defeating Acererak’s skull, the total xp value of this tomb raid is 152,895 xp. Defeating the skull adds 100,000 xp to the total, for 252,895 xp. So 150K or 250K xp to be split among the surviving characters. (Six surviving characters = 25,483 or 42,149 xp each. For reference: a 12th level fighter needs 250,ooo xp for 13th level; a magic-user needs 375,000 xp.)
Compare all of this to the total gp and xp that can be earned in Hall of the Fire Giant King (the adventure of equivalent level): 1 million gp, 1.6 million xp — 3.5 times more gp, and 10.6 or 6.4 times more xp.
What about the solid gold couch, adamantite doors, mithril valves and doors and vault?