Tip overview

Grohk relies on totem healing to keep himself alive (most of the time). Cauterize should be first priority.

Grohk recently lost damage on his LMB, he is easy to duel if you have good accuracy. Cauterize helps as well.

Don't ignore his Shock Pulse, especially if you have Deployables. Take grohk out first if he has maelstrom, and you'll find the game much easier.

If Grohk uses Spirit's Domain, his lightning doesn't hit through allies, but his Shock Pulse does. He may try to stay in the front if they group to get some damage in, so use that opportunity to burst him down.

A Grohk with Maelstrom sacrifices healing for large amounts os AoE damage and self-healing, allowing him to solo duos and even trios. Grab Cauterize to shut him down instantly.