Shadow Hunter Vosh'gajin

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.
Shadow Hunter Vosh'gajin
Elite HumanoidVosh'gajin combines a nearby-group Hex with Curse of Blood, making separation and the correct debuff removal more important than simply outhealing the pull.
Abilities

Hex
Transforms nearby enemies into frogs, rendering them unable to attack or cast spells for 10 seconds.
Keep healers outside the nearby Hex when possible and remove its magic effect from a disabled healer or tank promptly.

Curse of Blood
Remove Curse of Blood from players taking melee hits; it increases the Physical damage they receive and requires curse removal rather than a magic dispel.
Tank- Keep Vosh'gajin apart from the healers so the nearby Hex does not disable the group together. Use a defensive if Curse of Blood remains on you while you are being hit.
Healer- Arrange magic removal for Hex and curse removal for Curse of Blood before the pull. Free a disabled healer quickly, then address the cursed tank's increased Physical damage.
Damage- Stop accompanying Shadow Priests from casting Mana Burn, then focus Vosh'gajin. If you can remove curses, clear Curse of Blood from the tank while the healer handles Hex.