High Inquisitor Fairbanks

Cathedral
Unlock the Cathedral and clear the courtyard, then the church interior and side aisles before approaching Mograine. Visit Fairbanks in the concealed chamber on the right-hand side before starting the altar encounter. Leave the church clear of Scarlet Abbots for the sleep and resurrection sequence with Whitemane.

High Inquisitor Fairbanks
Elite UndeadFairbanks combines Curse of Blood's increased Physical damage with a protective shield and Heal in the Cathedral's concealed chamber.
Abilities

Curse of Blood
Remove Curse of Blood from the melee target when curse removal is available; otherwise cover the increased Physical damage with healing and mitigation.

Power Word: Shield
Keep a dedicated interrupt ready for Heal while Power Word: Shield holds; absorbed Physical hits will not delay his casting. This shield is not a target for an offensive magic dispel.

Heal
Calls upon Holy magic to heal an ally.
Interrupt Fairbanks's Heal instead of allowing him to recover behind Power Word: Shield.

Dispel Magic
Dispels magic on the target, removing 1 harmful spell from an ally or 1 beneficial spell from an enemy.
Reapply useful tank buffs after Fairbanks removes them with Dispel Magic.
Tank- Use mitigation while Curse of Blood increases the Physical damage you take. Keep Heal interruption assigned even when Fairbanks is shielded, and request replacement protection if Dispel Magic removes a useful buff.
Healer- Remove Curse of Blood if your abilities allow curse removal; a magic cleanse is not the same effect. Replace protection lost to Dispel Magic and cover the cursed tank's increased melee damage.
Damage- Reserve a direct spell interrupt for Heal rather than relying on attack damage to delay it through Power Word: Shield. Break the shield with damage instead of spending an offensive magic dispel on it.