Wizard of Oz is tough. We wiped quite a few times before we finally got it down. When we did get it down the strategy we used was:
Dorothy - Nobody tanks her. Her aggro is random anyway. She is burned down as quickly as possible, and is the first kill. Feel free to go balls to the wall on DPS, as clothies don't have to worry about taking aggro (they will take aggro anyway since it's totally random).
Toto - The OT picks up Toto as soon as it spawns. Get ready to Intercept him and have some stored Rage for Shield Slam (or make sure Bloodrage is up). Toto is killed second, immediately after Dorothy.
Roar - The OT picks up Roar as soon as the event starts. Don't tank him though, just build enough threat so that he runs to the OT instead of the warlocks when fear breaks. On that note, the warlocks should be fear bombing him the whole fight. Roar is killed third, after Toto. Once you start fighting him for real (after Toto is dead), youll want to stop fear bombing him. He hits hard though, especially if you don't have many epics yet. Make sure the tanks keep you topped off.
Strawman - MT picks up Strawman as soon as the event starts. Similar to Roar though, just enough aggro so that he runs to the MT whenever his "CC" breaks. Killed 4th, after Roar. Until then, mages are using fire spells on him since they will disorient him. But not super strong fire spells, save those for Dorothy since you're trying to burn dorothy down fast. Spamming Fire spells on Strawman is a pretty effective form of CC though, since they have a very high chance to disorient him.
Tinman - MT picks up Tinman as soon as the event starts. For the first 2 minutes or so of the fight Tinman is straight tanked by the MT, with the MT pointing him into a corner (he uses a powerful Cleave). As he begins to rust, he will start moving slowly, then the MT starts kiting him around the room in a circle. Tinman is killed last.
Once we agreed on this plan we beat the event our first try without any deaths.
Oh, and the Crone I don't even know what we did. If you beat the first 4 the Crone pretty much is a joke. Just stick everyone on it and attack till it's dead.
Edited, Feb 11th 2008 11:13am by duvar