Encountering Grover in long range open spaces - don't PEEK around the corner.
Good Grover players throw axes preemptively and you can take a lot of damage. Use short sprints between cover. This way it's harder to predict where to aim.
If you're using Incitement IV, Ruckus is just a sitting duck for your Dodge Roll reset, especially if he's distracted by your teammates. He's easy to hit, you're not.
Use Pursuit only when the enemy is low on health since it doesn't do as much damage and if you don't kill them with it you could possibly die,since you are vulnerable and aren't doing as much damage to kill them.