Ash's Shoulder Bash has a long windup before she dashes. If you have 5 stacks of Darkness, you can use your Dark Siphon to cancel her movement.

While Ash is within the zone of her ultimate, your ult is unable to affect her, so save yours for another time.

Vivian has some of the highest sustained DPS in the game, especially with her ult active. If an ally gets hit by Yag's ult, you'll easily be able to shred through her ultimate health to save them.

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.