So recently the character, Vayne, The Night Hunter, came out and I have gotten to play many rounds with her and this is the best built I have come up with to get those kills to win every game!

What I mainly focused on when getting items in game, I found it very beneficial to get heavy attack speed. This is because her W is a passive with on every third hit in a roll a percentage of their maximum health. The faster you can get the stacks on someone, the more damage you'll be putting out. Also, with "Frozen Mallet's" slow, the enemy won't be able to run away from your increased running speed when you're near them (Plus the health from it gets your health up to something reasonable).

Tumble-

The roll increases your AD, when you have to get a hit right after you use it for it to cooldown faster.

Silver Bolts-

Every 3 regular attacks a percentage of their total health is hit.

Condemn-

You need to make sure to angle your shot to bounce the target against the wall, stunning and slowing them.

Final Hour-

Your AD is increased and your passive(running faster when close to enemies) is quadrupled. Also when you use your Tumble you go stealth from a few seconds.