Not Updated For Current Season
Here's a build that will make you climb the curtains. I guarantee you a minimum of 15 frag with less than 5 deaths.
Money is a problem especially since Vayne does not hurt at first. So simply put, until level 7 or 8 save so that you can. Take the boots and make a ghost dancer. If you play safe and proper lane, take hidden blade. And s will increase your stack and you will sting all who come. Take a ghost dancer and then a razor mordred very effective against tanks.