With the Treacherous Ground talent, you can prevent Grohk from using his Ghost Walk. With moderate levels of anti-healing, you can potentially kill him even through the healing of his totems.

If you have several totems down and Willo hits you with Dead Zone, you can use your Ghost Walk to briefly cleanse the effect and continue to heal yourself.

Strix's stealth can make him harder to track, so toss your Sensor Drones out where you expect him to be and reveal him to your team. If you run the Booby Trap talent, the explosion of your drones can disrupt his aim or throw him off of high ground.

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.