With this build / masteries / runes you can have to much damage , phantom for critical *chance,damage* and for movement speed that stacks with passive very good.Infinity gives extra critical *chance , damage * and with blood thister/infinity edge have already to much damage.Last whisper = armor pen. that makes tanks to be 0.And ofc guardians angel to have more magic ressist and armor and if you die you can revive and have a chance to escape or kill your enemy. :))