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.
That's my build for critical twitch.
Explain how many items.
When you have the Malady,Infinite,boots and Spectral, you sell the Avarice (1) and buy the blodd razors and sell the Avarice (2) to buy another spectral or a Black cleaver (since you prefer), it's easy to have and i think thats a great mode to gank.