Exorcism is insanely good against the inspired.  Unfortunately, the Quori are from a dimension that got completely knocked away from Eberron and information about it occulted, so figuring out much about them is a bitch.  (legend lore and commune are your best friends here)<br/><br/>A DC 23 knowledge (religion) check suggests that if the Inspired are, as they claim, the consorts of divine beings, such divine beings could report on them, thus meaning that the party has incurred the wrath of the pantheon of the path of light.  Which would be... bad.<br/><br/>On a more OOCly note, would you guys mind allowing  Quori spirits to use their supernatural and psionic abilities on characters they're invading the dreams of if said characters get to use their abilities on the Quori spirits in return?  Hit point damage taken during a dream doesn't affect the character unless there's enough damage to knock the character to 0hp or less, in which case the character is affected as if nightmare had been cast on it.  Spells used during a dream count against the previous day's spells.  Spell trigger and spell completion items used during a dream are used in real life.<br/><br/>If the characters get used to lucid dreaming induced by Quori dream invasion, they might be able to trace their dreams backwards and thereby travel to the plane of Dal Quor.  (Astral travel might also accomplish the same ends, but is neccisarily riskier and more time consuming.)