Veteran, plasma, krak and shout

All in all excellent. Kills gunners, cracks armour with krak grenades, spams the shout to push and clear the way, and marks bosses for focus target.

Job

Kill the gunners. Gunner and shooter lines are in almost every Havoc patrol and shred toughness from range. The plasma gun pierces, so it reaches them through the crowd.
Krak grenades for armour. Crushers, bulwarks and armoured elites.
Shout nonstop. The shout (Voice of Command) is not saved for emergencies. It helps every push and clears the way, so it goes out whenever it is back up.
Focus target on bosses. Tag the monster or captain, and three duelling swords do the rest much faster.

Why it fits Havoc

From rank 30 there is no quiet phase: every pacing state allows every spawn type. A team that waits for a lull never moves. The Veteran’s shout is what makes a push possible anyway.

Captains come every 120-240 m at rank 30+, and monster specials roll in on top, so a fast boss kill with focus target saves a lot of punishment over a mission.

Callouts that belong to you

“Gunners left.” “Krak on the Crusher.” “Shouting, push.” “Focus on the boss.”