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.
Threats to Viktor with this build
AD Viktor is not troll and is really viable. Viktor's Q has a 100%AD scaling.Think about this,upgrade the Siphon Power(Q) makes u gain movement speed after u land your Q.Since u have a decent amount of AD u can deal massive damage and use the bonus movement speed to kite tanks.Conversely,if ur chasing your enemy,u can place a Gravity Field(W) to get closer and use Q to infinity chase.In this build,I think the Trinity Force is the essential item,first,Trinity Force plus Infinity Edge and a Essence Reaver will reach 40%CDR. In addition,the passive from Sheen and Phage work tremendously on Viktor. After Trinity Force,just build flat AD. Armor pen is useless on Viktor so **** it.Don't build Youmuu and Duskblade.