Ret Paladin - Art of War - Flash of Light/ Exorcism ??

[Lax]

I think spellcasting is a protected function, so I dont think that code will work

[MiRai]

PROTECTED CastSpellByName("name"[, onSelf]) - Cast the specified spell by display name. As of patch 2.0, this function has been restricted to Blizzard signed UI mods. Note: You can still use this function to open Craft windows and activate Lock Picking.

According to WoWWiki.