The Quas Exort Meteor Hammer timing around 10 minutes is a huge power spike, so force fights or take towers right as it comes online.

Use Ghost Walk aggressively, the slow lets you position for ganks and it is on a short 35 second cooldown at all levels.

Ice Wall is one of the strongest area denial tools in teamfights, but it is cast perpendicular to your facing so aim your hero model first.

Tornado lift duration sets up every combo and changes with each Quas level, so practice landing follow ups exactly as the lift ends.

Tornado into EMP is the bread and butter of Quas Wex, at level 15 with max Wex it drains 450 mana from every enemy caught.

Watch the minimap constantly for Sun Strike, every time an allied hero ganks a side lane you should be looking for a free global hit.