My favorite multi class was a Half Elf Cleric Mage. You get the cool half elf bonuses to sleep and charm, and you have access to pretty much every decent spell in the game, plus heavy armor and decent melee capability. It really could not be beat.
I had a friend who loved to play the fighter/mage/thief elf. I got him to realize that a strait Elven mage was a better option. You can use invisibility, find and remove traps, knock, spider climb, etc basically a mage can do everything a thief does, except back stab' but then a thief can not throw a 10d6 fireball either so....
the rest were just silly in my opinion. Cleric Ranger? really?
