Every choice you make matters, but keep in mind that you will need to learn how to play that champ, that build you are looking. We are here to give you a direction, for items and play styles, but you will be the player and you will need to kill those other champs. Items reflects your play style and i personally like to play assassins like assassins are supposed to be played like: FULL DAMAGE. **** protection. A little survivability is nice earlygame, but later-on you want to kill people, not to take damage from enemies. The faster you do damage to enemies the faster you will kill em. Then you can flee with a smile on your face that says "hey, i killed the enemy carry. our carry is alive, we won this teamfight" :D:DD:D:DD::D:DD:D::D
This build is the best on mobafire and i know it, you will just need to try it out and then go into rankeds to kick some ***!