In a straight DPS fight, Vivian does more damage than Zhin. If you have Deflector Shield up, you're likely to win the 1v1. Be wary of his ultimate and Whirl, as both will ignore your shield and the latter can place him behind you.
Try to keep track of Androxus ult, particularly when your ult is either ready or active, as Andro can burst all his ult shots on you to kill you and/or destroy your drones.
Terminus's axe can cleave through your shield and will hit your ultimate drones, and his Shatterfall will make it hard to run. Keep at a distance from him at all times if possible.