After attending my first tournament, I would have to say that my EC/Griffon were far and away my army's MVP. The griffon only perished in one game due to some very unfortunate rolling against the skaven, and proceeded not to take a scratch in the next two games-- BOTH AGAINST DWARFS! (Yes, these were very typical dwarf armies too-- handgunners, cannons, bolththrowers, xbows, etc.) The way I see it is that you have 6 turns to make something happen with that unit, and I'm patient enough to wait out all of them to get that one decisive charge.