War Master Voone

Lower Spire: ogres and trolls
Take the Lower Spire descent rather than the locked upper doorway. Cross the bridges into the ogre quarter for Highlord Omokk, then continue through the troll rooms to Shadow Hunter Vosh'gajin and War Master Voone. Pull bridge packs onto a cleared platform, and finish each caster pack before advancing into the next room.

War Master Voone
Elite HumanoidVoone combines Cleave and extra melee attacks with Snap Kick, leaving the tank vulnerable while stunned and punishing melee players who stand beside them.
Abilities

Cleave
Keep everyone except the tank out of Voone's front so Cleave does not hit nearby melee players.

Snap Kick
Keep the tank healthy before Snap Kick; the stun can coincide with Voone's additional melee attacks.

Thrash
Gives the caster 2 extra attacks.
Allow for extra melee swings rather than assuming a steady gap between hits, especially while Snap Kick prevents the tank from acting.

Throw Axe
Watch the player struck by Throw Axe and recover their health before the next attack instead of concentrating every heal on Voone's tank.
Tank- Give Voone a fixed facing for Cleave and prepare mitigation before a Snap Kick leaves you unable to act during his extra swings.
Healer- Keep a health buffer on the tank for Snap Kick followed by Thrash, and spot-heal the player hit by Throw Axe without abandoning the tank.
Damage- Attack from behind Voone, outside Cleave. If he turns toward you, stop attacking and move out of his front while the tank regains control.