This build is a pick playstyle, that means AFTER Phantom Strike you should be communicating to your team either by voice or pings for picks
Look to Pstrike charge targets near your teammates, once you get more damage online, you can Pstrike solo targets and explode them
Additionally, because your Charge is on a 15s cooldown at max level now, it is a completely viable escape tool
Make sure to practice charge cancelling!