Tip overview

Dive seris when she's healing or already wasted shadow travel

Her projectiles fly very slowly. It is important to dodge them so she can neither heal herself nor deal damage.

Just because you're behind cover, don't think your safe after fighting a Seris becuase rend soul can end you if you're low enough or just make you more vulnerable to any other unless she already used it.

If you are playing as a front liner and Seris casts her ultimate, you can put down your shield and prevent yourself and your teammates getting pulled in, and at the same time making her waste her ult.

Your shadow travel can make you immune to everything. Use it to cancel ultimates and abilities, or use it in sticky situations. (I recommend using veil since it can make you go into shadow travel faster.)