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.
If you are soloing a lane start with Doran's ring then Tear of the goddess before getting your boots and Amplifying tomb. Goal is to get your Rylai's Scepter and your Sorcerer's Shoes as fast as possible. When you have both you can literally hit with nothing but your Living artillery and slow them enough for you to kill them without them ever getting far enough from you to get away. The key is to keep the ult always in their face so you build up your mana so when you get your Archangel's Staff you can literally 3 hit most Heroes with a well placed void ooze/ Living Artillery combo and chase them for one or 2 more hits with Living Artillery for the kill. Always focus the weaker Dps in the back of the pack in team fights.