Here is my guide to tactics for the different zones that I have raided in. It lists spells that I have found to be particularly effective as well as spells found to be particularly ineffective. Also listed are mobs that cannot be mezzed so that no enchanter should waste their mana on them again (and needlessly get up their aggro list).
Plane of Disease guide
Plane of Innovation
Plane of Nightmares
Plane of Tactics (Drunder, The Fortress of Zek) guide
Plane of Valor guide