Personally Vi is my favorite champion at the moment and she is in need of some spotlight. She has very high base damage and can go tanky or even full ad/as. Her ganks are incredible and she is versatile in being able to play a very strong jungle and even top lane if need be. She is the best lock down champion in my opinion and her aoe and knockback makes her great for team fighting while her ult can lock down the carry.
Pros / Cons
Vi is going the be very squishy which is why life steal is key. this build is meant to destroy anyone and everyone and makes lockingdown people as easy as clicking one button.
If you believe you have the balls to make sick plays here are a few for you.
E+Ult+walking behind enemy+Q