User blog comment:StrategicMagic/Vayne - Carry? Yes. AD? No./@comment-4434378-20120819134440

Never start Dagger/LongSword/AmpTome. They give you one potion, no sustain stats, and only help you when dueling (which any good carry player will know not to do with Vayne). You will have slightly better farm than your support if you go a build like this vs. Cait.