Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
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.