Witch Doctor Zum'rah

Burial ground
Clear visible undead before approaching Witch Doctor Zum'rah. Open any graves the group intends to loot between pulls, not during his fight. Leave room to collect undead without chasing them into another graveyard pack, and destroy his summoning ward as soon as it appears.
Witch Doctor Zum'rah
Elite HumanoidZum'rah turns the graveyard into a fight against repeated summons and party-wide Shadow damage unless his ward and casts are stopped.
Abilities

Ward of Zum'rah
Casts a Ward of Zum'rah totem, which lasts 20 seconds. and periodically summons a Skeleton of Zum'rah. Each Skeleton lasts 20 seconds.
Destroy Ward of Zum'rah immediately to stop it producing more attackers among the graves.

Healing Wave
Calls upon Nature magic to heal an ally.
Interrupt Healing Wave so Zum'rah cannot recover while the group clears his summons.

Shadow Bolt Volley
Hurls missiles of dark magic, inflicting Shadow damage to nearby enemies.
Interrupt the volley to prevent Shadow damage across the players near Zum'rah.

Shadow Bolt
Hurls a bolt of dark magic at an enemy, inflicting Shadow damage.
Use spare interrupts on Shadow Bolt after covering Healing Wave and the volley.
Tank- Start Zum'rah only after the visible graveyard pull is cleared. Gather undead onto the cleared fighting ground without opening more graves or moving the fight through untouched packs.
Healer- Cure any Infected Wound left from the graveyard before starting Zum'rah. During the fight, cover the players struck by Shadow Bolt Volley while the tank collects the ward's attackers.
Damage- Switch immediately to Ward of Zum'rah so the graveyard does not fill with its summons. Divide interrupts between Healing Wave and Shadow Bolt Volley, and leave graves unopened during combat.