I'm afraid I haven't a clue how I would set things up if I were Voldemort, because I'm still not clear on what it is he's actually trying to accomplish. Assuming I were simply trying to defeat Dumbledore, I can think of what I might have done that would explain some of Quirrel's actions, but not others.

Actually, on second thought, if my opponent were Dumbledore, I think I do know what I'd do, because it's a Dark Lord strategy I've contemplated before which seems practically tailor made to the situation.

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