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.
build and items
the build is for killing quick. with its 165% extra attack speed and its 100% crit rate you dont have to build around pure dammage, because you get a critical hit on every attack, above that you get another 50% extra critical damage from your Infinity Edge.
you also get 4% extra damage from your BloodRazor based on the max healt cap of you're oponent you are against with a max cap of 75 damage on minions and monsters and no cap on champions
so if your oponent has 2000hp you get 80 damage extra on hit bij 4000hp its 160 on hit with a increase of 250% damage because all you're hit are crits so 2000hp is 160 on hit and 4000 is 320 on hit.
because of the speed you do around 2/2,5 hit a second so you could do a lot of dammage in a couple of seconds because of you're crit rate and damage